1 | /* SimpleFit.c |
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2 | |
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3 | A simplified project designed to act as a template for your curve fitting function. |
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4 | The fitting function is a simple polynomial. It works but is of no practical use. |
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5 | */ |
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6 | |
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7 | #include "StandardHeaders.h" // Include ANSI headers, Mac headers |
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8 | #include "GaussWeights.h" |
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9 | #include "libSphere.h" |
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10 | |
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11 | // scattering from a sphere - hardly needs to be an XOP... |
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12 | double |
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13 | SphereForm(double dp[], double q) |
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14 | { |
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15 | double scale,radius,delrho,bkg,sldSph,sldSolv; //my local names |
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16 | double bes,f,vol,f2,pi,qr; |
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17 | |
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18 | pi = 4.0*atan(1.0); |
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19 | scale = dp[0]; |
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20 | radius = dp[1]; |
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21 | sldSph = dp[2]; |
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22 | sldSolv = dp[3]; |
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23 | bkg = dp[4]; |
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24 | |
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25 | delrho = sldSph - sldSolv; |
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26 | //handle qr==0 separately |
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27 | qr = q*radius; |
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28 | if(qr == 0.0){ |
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29 | bes = 1.0; |
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30 | }else{ |
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31 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
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32 | } |
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33 | |
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34 | vol = 4.0*pi/3.0*radius*radius*radius; |
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35 | f = vol*bes*delrho; // [=] A-1 |
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36 | // normalize to single particle volume, convert to 1/cm |
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37 | f2 = f * f / vol * 1.0e8; // [=] 1/cm |
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38 | |
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39 | return(scale*f2+bkg); //scale, and add in the background |
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40 | } |
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41 | |
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42 | // scattering from a monodisperse core-shell sphere - hardly needs to be an XOP... |
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43 | double |
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44 | CoreShellForm(double dp[], double q) |
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45 | { |
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46 | double x,pi; |
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47 | double scale,rcore,thick,rhocore,rhoshel,rhosolv,bkg; //my local names |
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48 | double bes,f,vol,qr,contr,f2; |
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49 | |
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50 | pi = 4.0*atan(1.0); |
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51 | x=q; |
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52 | |
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53 | scale = dp[0]; |
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54 | rcore = dp[1]; |
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55 | thick = dp[2]; |
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56 | rhocore = dp[3]; |
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57 | rhoshel = dp[4]; |
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58 | rhosolv = dp[5]; |
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59 | bkg = dp[6]; |
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60 | // core first, then add in shell |
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61 | qr=x*rcore; |
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62 | contr = rhocore-rhoshel; |
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63 | if(qr == 0.0){ |
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64 | bes = 1.0; |
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65 | }else{ |
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66 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
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67 | } |
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68 | vol = 4.0*pi/3.0*rcore*rcore*rcore; |
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69 | f = vol*bes*contr; |
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70 | //now the shell |
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71 | qr=x*(rcore+thick); |
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72 | contr = rhoshel-rhosolv; |
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73 | if(qr == 0.0){ |
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74 | bes = 1.0; |
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75 | }else{ |
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76 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
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77 | } |
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78 | vol = 4.0*pi/3.0*pow((rcore+thick),3); |
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79 | f += vol*bes*contr; |
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80 | |
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81 | // normalize to particle volume and rescale from [A-1] to [cm-1] |
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82 | f2 = f*f/vol*1.0e8; |
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83 | |
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84 | //scale if desired |
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85 | f2 *= scale; |
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86 | // then add in the background |
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87 | f2 += bkg; |
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88 | |
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89 | return(f2); |
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90 | } |
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91 | |
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92 | // scattering from a unilamellar vesicle - hardly needs to be an XOP... |
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93 | // same functional form as the core-shell sphere, but more intuitive for a vesicle |
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94 | double |
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95 | VesicleForm(double dp[], double q) |
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96 | { |
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97 | double x,pi; |
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98 | double scale,rcore,thick,rhocore,rhoshel,rhosolv,bkg; //my local names |
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99 | double bes,f,vol,qr,contr,f2; |
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100 | pi = 4.0*atan(1.0); |
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101 | x= q; |
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102 | |
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103 | scale = dp[0]; |
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104 | rcore = dp[1]; |
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105 | thick = dp[2]; |
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106 | rhocore = dp[3]; |
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107 | rhosolv = rhocore; |
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108 | rhoshel = dp[4]; |
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109 | bkg = dp[5]; |
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110 | // core first, then add in shell |
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111 | qr=x*rcore; |
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112 | contr = rhocore-rhoshel; |
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113 | if(qr == 0){ |
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114 | bes = 1.0; |
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115 | }else{ |
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116 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
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117 | } |
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118 | vol = 4.0*pi/3.0*rcore*rcore*rcore; |
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119 | f = vol*bes*contr; |
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120 | //now the shell |
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121 | qr=x*(rcore+thick); |
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122 | contr = rhoshel-rhosolv; |
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123 | if(qr == 0.0){ |
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124 | bes = 1.0; |
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125 | }else{ |
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126 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
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127 | } |
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128 | vol = 4.0*pi/3.0*pow((rcore+thick),3); |
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129 | f += vol*bes*contr; |
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130 | |
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131 | // normalize to the particle volume and rescale from [A-1] to [cm-1] |
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132 | //note that for the vesicle model, the volume is ONLY the shell volume |
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133 | vol = 4.0*pi/3.0*(pow((rcore+thick),3)-pow(rcore,3)); |
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134 | f2 = f*f/vol*1.0e8; |
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135 | |
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136 | //scale if desired |
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137 | f2 *= scale; |
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138 | // then add in the background |
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139 | f2 += bkg; |
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140 | |
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141 | return(f2); |
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142 | } |
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143 | |
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144 | |
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145 | // scattering from a core shell sphere with a (Schulz) polydisperse core and constant shell thickness |
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146 | // |
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147 | double |
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148 | PolyCoreForm(double dp[], double q) |
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149 | { |
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150 | double pi; |
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151 | double scale,corrad,sig,zz,del,drho1,drho2,form,bkg; //my local names |
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152 | double d, g ,h; |
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153 | double qq, x, y, c1, c2, c3, c4, c5, c6, c7, c8, c9, t1, t2, t3; |
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154 | double t4, t5, tb, cy, sy, tb1, tb2, tb3, c2y, zp1, zp2; |
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155 | double zp3,vpoly; |
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156 | double s2y, arg1, arg2, arg3, drh1, drh2; |
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157 | |
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158 | pi = 4.0*atan(1.0); |
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159 | qq= q; |
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160 | scale = dp[0]; |
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161 | corrad = dp[1]; |
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162 | sig = dp[2]; |
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163 | del = dp[3]; |
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164 | drho1 = dp[4]-dp[5]; //core-shell |
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165 | drho2 = dp[5]-dp[6]; //shell-solvent |
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166 | bkg = dp[7]; |
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167 | |
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168 | zz = (1.0/sig)*(1.0/sig) - 1.0; |
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169 | |
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170 | h=qq; |
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171 | |
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172 | drh1 = drho1; |
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173 | drh2 = drho2; |
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174 | g = drh2 * -1. / drh1; |
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175 | zp1 = zz + 1.; |
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176 | zp2 = zz + 2.; |
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177 | zp3 = zz + 3.; |
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178 | vpoly = 4*pi/3*zp3*zp2/zp1/zp1*pow((corrad+del),3); |
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179 | |
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180 | |
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181 | // remember that h is the passed in value of q for the calculation |
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182 | y = h *del; |
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183 | x = h *corrad; |
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184 | d = atan(x * 2. / zp1); |
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185 | arg1 = zp1 * d; |
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186 | arg2 = zp2 * d; |
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187 | arg3 = zp3 * d; |
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188 | sy = sin(y); |
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189 | cy = cos(y); |
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190 | s2y = sin(y * 2.); |
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191 | c2y = cos(y * 2.); |
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192 | c1 = .5 - g * (cy + y * sy) + g * g * .5 * (y * y + 1.); |
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193 | c2 = g * y * (g - cy); |
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194 | c3 = (g * g + 1.) * .5 - g * cy; |
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195 | c4 = g * g * (y * cy - sy) * (y * cy - sy) - c1; |
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196 | c5 = g * 2. * sy * (1. - g * (y * sy + cy)) + c2; |
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197 | c6 = c3 - g * g * sy * sy; |
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198 | c7 = g * sy - g * .5 * g * (y * y + 1.) * s2y - c5; |
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199 | c8 = c4 - .5 + g * cy - g * .5 * g * (y * y + 1.) * c2y; |
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200 | c9 = g * sy * (1. - g * cy); |
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201 | |
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202 | tb = log(zp1 * zp1 / (zp1 * zp1 + x * 4. * x)); |
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203 | tb1 = exp(zp1 * .5 * tb); |
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204 | tb2 = exp(zp2 * .5 * tb); |
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205 | tb3 = exp(zp3 * .5 * tb); |
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206 | |
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207 | t1 = c1 + c2 * x + c3 * x * x * zp2 / zp1; |
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208 | t2 = tb1 * (c4 * cos(arg1) + c7 * sin(arg1)); |
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209 | t3 = x * tb2 * (c5 * cos(arg2) + c8 * sin(arg2)); |
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210 | t4 = zp2 / zp1 * x * x * tb3 * (c6 * cos(arg3) + c9 * sin(arg3)); |
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211 | t5 = t1 + t2 + t3 + t4; |
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212 | form = t5 * 16. * pi * pi * drh1 * drh1 / pow(qq,6); |
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213 | // normalize by the average volume !!! corrected for polydispersity |
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214 | // and convert to cm-1 |
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215 | form /= vpoly; |
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216 | form *= 1.0e8; |
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217 | //Scale |
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218 | form *= scale; |
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219 | // then add in the background |
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220 | form += bkg; |
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221 | |
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222 | return(form); |
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223 | } |
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224 | |
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225 | // scattering from a uniform sphere with a (Schulz) size distribution |
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226 | // structure factor effects are explicitly and correctly included. |
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227 | // |
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228 | double |
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229 | PolyHardSphereIntensity(double dp[], double q) |
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230 | { |
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231 | double pi; |
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232 | double rad,z2,phi,cont,bkg,sigma; //my local names |
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233 | double mu,mu1,d1,d2,d3,d4,d5,d6,capd,rho; |
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234 | double ll,l1,bb,cc,chi,chi1,chi2,ee,t1,t2,t3,pp; |
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235 | double ka,zz,v1,v2,p1,p2; |
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236 | double h1,h2,h3,h4,e1,yy,y1,s1,s2,s3,hint1,hint2; |
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237 | double capl,capl1,capmu,capmu1,r3,pq; |
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238 | double ka2,r1,heff; |
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239 | double hh,k,slds,sld; |
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240 | |
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241 | pi = 4.0*atan(1.0); |
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242 | k= q; |
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243 | |
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244 | rad = dp[0]; // radius (A) |
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245 | z2 = dp[1]; //polydispersity (0<z2<1) |
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246 | phi = dp[2]; // volume fraction (0<phi<1) |
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247 | slds = dp[3]; |
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248 | sld = dp[4]; |
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249 | cont = (slds - sld)*1.0e4; // contrast (odd units) |
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250 | bkg = dp[5]; |
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251 | sigma = 2*rad; |
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252 | |
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253 | zz=1.0/(z2*z2)-1.0; |
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254 | bb = sigma/(zz+1.0); |
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255 | cc = zz+1.0; |
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256 | |
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257 | //*c Compute the number density by <r-cubed>, not <r> cubed*/ |
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258 | r1 = sigma/2.0; |
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259 | r3 = r1*r1*r1; |
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260 | r3 *= (zz+2.0)*(zz+3.0)/((zz+1.0)*(zz+1.0)); |
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261 | rho=phi/(1.3333333333*pi*r3); |
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262 | t1 = rho*bb*cc; |
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263 | t2 = rho*bb*bb*cc*(cc+1.0); |
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264 | t3 = rho*bb*bb*bb*cc*(cc+1.0)*(cc+2.0); |
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265 | capd = 1.0-pi*t3/6.0; |
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266 | //************ |
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267 | v1=1.0/(1.0+bb*bb*k*k); |
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268 | v2=1.0/(4.0+bb*bb*k*k); |
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269 | pp=pow(v1,(cc/2.0))*sin(cc*atan(bb*k)); |
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270 | p1=bb*cc*pow(v1,((cc+1.0)/2.0))*sin((cc+1.0)*atan(bb*k)); |
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271 | p2=cc*(cc+1.0)*bb*bb*pow(v1,((cc+2.0)/2.0))*sin((cc+2.0)*atan(bb*k)); |
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272 | mu=pow(2,cc)*pow(v2,(cc/2.0))*sin(cc*atan(bb*k/2.0)); |
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273 | mu1=pow(2,(cc+1.0))*bb*cc*pow(v2,((cc+1.0)/2.0))*sin((cc+1.0)*atan(k*bb/2.0)); |
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274 | s1=bb*cc; |
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275 | s2=cc*(cc+1.0)*bb*bb; |
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276 | s3=cc*(cc+1.0)*(cc+2.0)*bb*bb*bb; |
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277 | chi=pow(v1,(cc/2.0))*cos(cc*atan(bb*k)); |
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278 | chi1=bb*cc*pow(v1,((cc+1.0)/2.0))*cos((cc+1.0)*atan(bb*k)); |
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279 | chi2=cc*(cc+1.0)*bb*bb*pow(v1,((cc+2.0)/2.0))*cos((cc+2.0)*atan(bb*k)); |
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280 | ll=pow(2,cc)*pow(v2,(cc/2.0))*cos(cc*atan(bb*k/2.0)); |
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281 | l1=pow(2,(cc+1.0))*bb*cc*pow(v2,((cc+1.0)/2.0))*cos((cc+1.0)*atan(k*bb/2.0)); |
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282 | d1=(pi/capd)*(2.0+(pi/capd)*(t3-(rho/k)*(k*s3-p2))); |
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283 | d2=pow((pi/capd),2)*(rho/k)*(k*s2-p1); |
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284 | d3=(-1.0)*pow((pi/capd),2)*(rho/k)*(k*s1-pp); |
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285 | d4=(pi/capd)*(k-(pi/capd)*(rho/k)*(chi1-s1)); |
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286 | d5=pow((pi/capd),2)*((rho/k)*(chi-1.0)+0.5*k*t2); |
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287 | d6=pow((pi/capd),2)*(rho/k)*(chi2-s2); |
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288 | |
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289 | e1=pow((pi/capd),2)*pow((rho/k/k),2)*((chi-1.0)*(chi2-s2)-(chi1-s1)*(chi1-s1)-(k*s1-pp)*(k*s3-p2)+pow((k*s2-p1),2)); |
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290 | ee=1.0-(2.0*pi/capd)*(1.0+0.5*pi*t3/capd)*(rho/k/k/k)*(k*s1-pp)-(2.0*pi/capd)*rho/k/k*((chi1-s1)+(0.25*pi*t2/capd)*(chi2-s2))-e1; |
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291 | y1=pow((pi/capd),2)*pow((rho/k/k),2)*((k*s1-pp)*(chi2-s2)-2.0*(k*s2-p1)*(chi1-s1)+(k*s3-p2)*(chi-1.0)); |
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292 | yy = (2.0*pi/capd)*(1.0+0.5*pi*t3/capd)*(rho/k/k/k)*(chi+0.5*k*k*s2-1.0)-(2.0*pi*rho/capd/k/k)*(k*s2-p1+(0.25*pi*t2/capd)*(k*s3-p2))-y1; |
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293 | |
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294 | capl=2.0*pi*cont*rho/k/k/k*(pp-0.5*k*(s1+chi1)); |
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295 | capl1=2.0*pi*cont*rho/k/k/k*(p1-0.5*k*(s2+chi2)); |
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296 | capmu=2.0*pi*cont*rho/k/k/k*(1.0-chi-0.5*k*p1); |
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297 | capmu1=2.0*pi*cont*rho/k/k/k*(s1-chi1-0.5*k*p2); |
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298 | |
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299 | h1=capl*(capl*(yy*d1-ee*d6)+capl1*(yy*d2-ee*d4)+capmu*(ee*d1+yy*d6)+capmu1*(ee*d2+yy*d4)); |
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300 | h2=capl1*(capl*(yy*d2-ee*d4)+capl1*(yy*d3-ee*d5)+capmu*(ee*d2+yy*d4)+capmu1*(ee*d3+yy*d5)); |
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301 | h3=capmu*(capl*(ee*d1+yy*d6)+capl1*(ee*d2+yy*d4)+capmu*(ee*d6-yy*d1)+capmu1*(ee*d4-yy*d2)); |
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302 | h4=capmu1*(capl*(ee*d2+yy*d4)+capl1*(ee*d3+yy*d5)+capmu*(ee*d4-yy*d2)+capmu1*(ee*d5-yy*d3)); |
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303 | |
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304 | //* This part computes the second integral in equation (1) of the paper.*/ |
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305 | |
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306 | hint1 = -2.0*(h1+h2+h3+h4)/(k*k*k*(ee*ee+yy*yy)); |
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307 | |
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308 | //* This part computes the first integral in equation (1). It also |
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309 | // generates the KC approximated effective structure factor.*/ |
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310 | |
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311 | pq=4.0*pi*cont*(sin(k*sigma/2.0)-0.5*k*sigma*cos(k*sigma/2.0)); |
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312 | hint2=8.0*pi*pi*rho*cont*cont/(k*k*k*k*k*k)*(1.0-chi-k*p1+0.25*k*k*(s2+chi2)); |
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313 | |
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314 | ka=k*(sigma/2.0); |
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315 | // |
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316 | hh=hint1+hint2; // this is the model intensity |
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317 | // |
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318 | heff=1.0+hint1/hint2; |
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319 | ka2=ka*ka; |
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320 | //* |
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321 | // heff is PY analytical solution for intensity divided by the |
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322 | // form factor. happ is the KC approximated effective S(q) |
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323 | |
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324 | //******************* |
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325 | // add in the background then return the intensity value |
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326 | |
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327 | return(hh+bkg); //scale, and add in the background |
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328 | } |
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329 | |
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330 | // scattering from a uniform sphere with a (Schulz) size distribution, bimodal population |
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331 | // NO CROSS TERM IS ACCOUNTED FOR == DILUTE SOLUTION!! |
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332 | // |
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333 | double |
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334 | BimodalSchulzSpheres(double dp[], double q) |
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335 | { |
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336 | double x,pq; |
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337 | double scale,ravg,pd,bkg,rho,rhos; //my local names |
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338 | double scale2,ravg2,pd2,rho2; //my local names |
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339 | |
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340 | x= q; |
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341 | |
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342 | scale = dp[0]; |
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343 | ravg = dp[1]; |
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344 | pd = dp[2]; |
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345 | rho = dp[3]; |
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346 | scale2 = dp[4]; |
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347 | ravg2 = dp[5]; |
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348 | pd2 = dp[6]; |
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349 | rho2 = dp[7]; |
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350 | rhos = dp[8]; |
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351 | bkg = dp[9]; |
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352 | |
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353 | pq = SchulzSphere_Fn( scale, ravg, pd, rho, rhos, x); |
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354 | pq += SchulzSphere_Fn( scale2, ravg2, pd2, rho2, rhos, x); |
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355 | // add in the background |
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356 | pq += bkg; |
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357 | |
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358 | return (pq); |
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359 | } |
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360 | |
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361 | // scattering from a uniform sphere with a (Schulz) size distribution |
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362 | // |
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363 | double |
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364 | SchulzSpheres(double dp[], double q) |
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365 | { |
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366 | double x,pq; |
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367 | double scale,ravg,pd,bkg,rho,rhos; //my local names |
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368 | |
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369 | x= q; |
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370 | |
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371 | scale = dp[0]; |
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372 | ravg = dp[1]; |
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373 | pd = dp[2]; |
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374 | rho = dp[3]; |
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375 | rhos = dp[4]; |
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376 | bkg = dp[5]; |
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377 | pq = SchulzSphere_Fn( scale, ravg, pd, rho, rhos, x); |
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378 | // add in the background |
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379 | pq += bkg; |
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380 | |
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381 | return(pq); |
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382 | } |
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383 | |
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384 | // calculates everything but the background |
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385 | double |
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386 | SchulzSphere_Fn(double scale, double ravg, double pd, double rho, double rhos, double x) |
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387 | { |
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388 | double zp1,zp2,zp3,zp4,zp5,zp6,zp7,vpoly; |
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389 | double aa,at1,at2,rt1,rt2,rt3,t1,t2,t3; |
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390 | double v1,v2,v3,g1,pq,pi,delrho,zz; |
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391 | double i_zero,Rg2,zp8; |
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392 | |
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393 | pi = 4.0*atan(1.0); |
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394 | delrho = rho-rhos; |
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395 | zz = (1.0/pd)*(1.0/pd) - 1.0; |
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396 | |
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397 | zp1 = zz + 1.0; |
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398 | zp2 = zz + 2.0; |
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399 | zp3 = zz + 3.0; |
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400 | zp4 = zz + 4.0; |
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401 | zp5 = zz + 5.0; |
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402 | zp6 = zz + 6.0; |
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403 | zp7 = zz + 7.0; |
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404 | // |
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405 | |
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406 | //small QR limit - use Guinier approx |
---|
407 | zp8 = zz+8.0; |
---|
408 | if(x*ravg < 0.1) { |
---|
409 | i_zero = scale*delrho*delrho*1.e8*4.*pi/3.*pow(ravg,3); |
---|
410 | i_zero *= zp6*zp5*zp4/zp1/zp1/zp1; //6th moment / 3rd moment |
---|
411 | Rg2 = 3.*zp8*zp7/5./(zp1*zp1)*ravg*ravg; |
---|
412 | pq = i_zero*exp(-x*x*Rg2/3.); |
---|
413 | //pq += bkg; //unlike the Igor code, the backgorund is added in the wrapper (above) |
---|
414 | return(pq); |
---|
415 | } |
---|
416 | // |
---|
417 | |
---|
418 | aa = (zz+1.0)/x/ravg; |
---|
419 | |
---|
420 | at1 = atan(1.0/aa); |
---|
421 | at2 = atan(2.0/aa); |
---|
422 | // |
---|
423 | // calculations are performed to avoid large # errors |
---|
424 | // - trick is to propogate the a^(z+7) term through the g1 |
---|
425 | // |
---|
426 | t1 = zp7*log10(aa) - zp1/2.0*log10(aa*aa+4.0); |
---|
427 | t2 = zp7*log10(aa) - zp3/2.0*log10(aa*aa+4.0); |
---|
428 | t3 = zp7*log10(aa) - zp2/2.0*log10(aa*aa+4.0); |
---|
429 | // print t1,t2,t3 |
---|
430 | rt1 = pow(10,t1); |
---|
431 | rt2 = pow(10,t2); |
---|
432 | rt3 = pow(10,t3); |
---|
433 | v1 = pow(aa,6) - rt1*cos(zp1*at2); |
---|
434 | v2 = zp1*zp2*( pow(aa,4) + rt2*cos(zp3*at2) ); |
---|
435 | v3 = -2.0*zp1*rt3*sin(zp2*at2); |
---|
436 | g1 = (v1+v2+v3); |
---|
437 | |
---|
438 | pq = log10(g1) - 6.0*log10(zp1) + 6.0*log10(ravg); |
---|
439 | pq = pow(10,pq)*8.0*pi*pi*delrho*delrho; |
---|
440 | |
---|
441 | // |
---|
442 | // beta factor is not used here, but could be for the |
---|
443 | // decoupling approximation |
---|
444 | // |
---|
445 | // g11 = g1 |
---|
446 | // gd = -zp7*log(aa) |
---|
447 | // g1 = log(g11) + gd |
---|
448 | // |
---|
449 | // t1 = zp1*at1 |
---|
450 | // t2 = zp2*at1 |
---|
451 | // g2 = sin( t1 ) - zp1/sqrt(aa*aa+1)*cos( t2 ) |
---|
452 | // g22 = g2*g2 |
---|
453 | // beta = zp1*log(aa) - zp1*log(aa*aa+1) - g1 + log(g22) |
---|
454 | // beta = 2*alog(beta) |
---|
455 | |
---|
456 | //re-normalize by the average volume |
---|
457 | vpoly = 4.0*pi/3.0*zp3*zp2/zp1/zp1*ravg*ravg*ravg; |
---|
458 | pq /= vpoly; |
---|
459 | //scale, convert to cm^-1 |
---|
460 | pq *= scale * 1.0e8; |
---|
461 | |
---|
462 | return(pq); |
---|
463 | } |
---|
464 | |
---|
465 | // scattering from a uniform sphere with a rectangular size distribution |
---|
466 | // |
---|
467 | double |
---|
468 | PolyRectSpheres(double dp[], double q) |
---|
469 | { |
---|
470 | double pi,x; |
---|
471 | double scale,rad,pd,cont,bkg; //my local names |
---|
472 | double inten,h1,qw,qr,width,sig,averad3,Rg2,slds,sld; |
---|
473 | |
---|
474 | pi = 4.0*atan(1.0); |
---|
475 | x= q; |
---|
476 | |
---|
477 | scale = dp[0]; |
---|
478 | rad = dp[1]; // radius (A) |
---|
479 | pd = dp[2]; //polydispersity of rectangular distribution |
---|
480 | slds = dp[3]; |
---|
481 | sld = dp[4]; |
---|
482 | cont = slds - sld; // contrast (A^-2) |
---|
483 | bkg = dp[5]; |
---|
484 | |
---|
485 | // as usual, poly = sig/ravg |
---|
486 | // for the rectangular distribution, sig = width/sqrt(3) |
---|
487 | // width is the HALF- WIDTH of the rectangular distrubution |
---|
488 | |
---|
489 | sig = pd*rad; |
---|
490 | width = sqrt(3.0)*sig; |
---|
491 | |
---|
492 | //x is the q-value |
---|
493 | qw = x*width; |
---|
494 | qr = x*rad; |
---|
495 | |
---|
496 | // as for the numerical inatabilities at low QR, the function is calculating the sines and cosines |
---|
497 | // just fine - the problem seems to be that the |
---|
498 | // leading terms nearly cancel with the last term (the -6*qr... term), to within machine |
---|
499 | // precision - the difference is on the order of 10^-20 |
---|
500 | // so just use the limiting Guiner value |
---|
501 | if(qr<0.1) { |
---|
502 | h1 = scale*cont*cont*1.e8*4.*pi/3.0*pow(rad,3); |
---|
503 | h1 *= (1. + 15.*pow(pd,2) + 27.*pow(pd,4) +27./7.*pow(pd,6) ); //6th moment |
---|
504 | h1 /= (1.+3.*pd*pd); //3rd moment |
---|
505 | Rg2 = 3.0/5.0*rad*rad*( 1.+28.*pow(pd,2)+126.*pow(pd,4)+108.*pow(pd,6)+27.*pow(pd,8) ); |
---|
506 | Rg2 /= (1.+15.*pow(pd,2)+27.*pow(pd,4)+27./7.*pow(pd,6)); |
---|
507 | h1 *= exp(-1./3.*Rg2*x*x); |
---|
508 | h1 += bkg; |
---|
509 | return(h1); |
---|
510 | } |
---|
511 | |
---|
512 | // normal calculation |
---|
513 | h1 = -0.5*qw + qr*qr*qw + (qw*qw*qw)/3.0; |
---|
514 | h1 -= 5.0/2.0*cos(2.0*qr)*sin(qw)*cos(qw); |
---|
515 | h1 += 0.5*qr*qr*cos(2.0*qr)*sin(2.0*qw); |
---|
516 | h1 += 0.5*qw*qw*cos(2.0*qr)*sin(2.0*qw); |
---|
517 | h1 += qw*qr*sin(2.0*qr)*cos(2.0*qw); |
---|
518 | h1 += 3.0*qw*(cos(qr)*cos(qw))*(cos(qr)*cos(qw)); |
---|
519 | h1+= 3.0*qw*(sin(qr)*sin(qw))*(sin(qr)*sin(qw)); |
---|
520 | h1 -= 6.0*qr*cos(qr)*sin(qr)*cos(qw)*sin(qw); |
---|
521 | |
---|
522 | // calculate P(q) = <f^2> |
---|
523 | inten = 8.0*pi*pi*cont*cont/width/pow(x,7)*h1; |
---|
524 | |
---|
525 | // beta(q) would be calculated as 2/width/x/h1*h2*h2 |
---|
526 | // with |
---|
527 | // h2 = 2*sin(x*rad)*sin(x*width)-x*rad*cos(x*rad)*sin(x*width)-x*width*sin(x*rad)*cos(x*width) |
---|
528 | |
---|
529 | // normalize to the average volume |
---|
530 | // <R^3> = ravg^3*(1+3*pd^2) |
---|
531 | // or... "zf" = (1 + 3*p^2), which will be greater than one |
---|
532 | |
---|
533 | averad3 = rad*rad*rad*(1.0+3.0*pd*pd); |
---|
534 | inten /= 4.0*pi/3.0*averad3; |
---|
535 | //resacle to 1/cm |
---|
536 | inten *= 1.0e8; |
---|
537 | //scale the result |
---|
538 | inten *= scale; |
---|
539 | // then add in the background |
---|
540 | inten += bkg; |
---|
541 | |
---|
542 | return(inten); |
---|
543 | } |
---|
544 | |
---|
545 | |
---|
546 | // scattering from a uniform sphere with a Gaussian size distribution |
---|
547 | // |
---|
548 | double |
---|
549 | GaussPolySphere(double dp[], double q) |
---|
550 | { |
---|
551 | double pi,x; |
---|
552 | double scale,rad,pd,sig,rho,rhos,bkg,delrho; //my local names |
---|
553 | double va,vb,zi,yy,summ,inten; |
---|
554 | int nord=20,ii; |
---|
555 | |
---|
556 | pi = 4.0*atan(1.0); |
---|
557 | x= q; |
---|
558 | |
---|
559 | scale=dp[0]; |
---|
560 | rad=dp[1]; |
---|
561 | pd=dp[2]; |
---|
562 | sig=pd*rad; |
---|
563 | rho=dp[3]; |
---|
564 | rhos=dp[4]; |
---|
565 | delrho=rho-rhos; |
---|
566 | bkg=dp[5]; |
---|
567 | |
---|
568 | va = -4.0*sig + rad; |
---|
569 | if (va<0.0) { |
---|
570 | va=0.0; //to avoid numerical error when va<0 (-ve q-value) |
---|
571 | } |
---|
572 | vb = 4.0*sig +rad; |
---|
573 | |
---|
574 | summ = 0.0; // initialize integral |
---|
575 | for(ii=0;ii<nord;ii+=1) { |
---|
576 | // calculate Gauss points on integration interval (r-value for evaluation) |
---|
577 | zi = ( Gauss20Z[ii]*(vb-va) + vb + va )/2.0; |
---|
578 | // calculate sphere scattering |
---|
579 | //return(3*(sin(qr) - qr*cos(qr))/(qr*qr*qr)); pass qr |
---|
580 | yy = F_func(x*zi)*(4.0*pi/3.0*zi*zi*zi)*delrho; |
---|
581 | yy *= yy; |
---|
582 | yy *= Gauss20Wt[ii] * Gauss_distr(sig,rad,zi); |
---|
583 | |
---|
584 | summ += yy; //add to the running total of the quadrature |
---|
585 | } |
---|
586 | // calculate value of integral to return |
---|
587 | inten = (vb-va)/2.0*summ; |
---|
588 | |
---|
589 | //re-normalize by polydisperse sphere volume |
---|
590 | inten /= (4.0*pi/3.0*rad*rad*rad)*(1.0+3.0*pd*pd); |
---|
591 | |
---|
592 | inten *= 1.0e8; |
---|
593 | inten *= scale; |
---|
594 | inten += bkg; |
---|
595 | |
---|
596 | return(inten); //scale, and add in the background |
---|
597 | } |
---|
598 | |
---|
599 | // scattering from a uniform sphere with a LogNormal size distribution |
---|
600 | // |
---|
601 | double |
---|
602 | LogNormalPolySphere(double dp[], double q) |
---|
603 | { |
---|
604 | double pi,x; |
---|
605 | double scale,rad,sig,rho,rhos,bkg,delrho,mu,r3; //my local names |
---|
606 | double va,vb,zi,yy,summ,inten; |
---|
607 | int nord=76,ii; |
---|
608 | |
---|
609 | pi = 4.0*atan(1.0); |
---|
610 | x= q; |
---|
611 | |
---|
612 | scale=dp[0]; |
---|
613 | rad=dp[1]; //rad is the median radius |
---|
614 | mu = log(dp[1]); |
---|
615 | sig=dp[2]; |
---|
616 | rho=dp[3]; |
---|
617 | rhos=dp[4]; |
---|
618 | delrho=rho-rhos; |
---|
619 | bkg=dp[5]; |
---|
620 | |
---|
621 | va = -3.5*sig + mu; |
---|
622 | va = exp(va); |
---|
623 | if (va<0.0) { |
---|
624 | va=0.0; //to avoid numerical error when va<0 (-ve q-value) |
---|
625 | } |
---|
626 | vb = 3.5*sig*(1.0+sig) +mu; |
---|
627 | vb = exp(vb); |
---|
628 | |
---|
629 | summ = 0.0; // initialize integral |
---|
630 | for(ii=0;ii<nord;ii+=1) { |
---|
631 | // calculate Gauss points on integration interval (r-value for evaluation) |
---|
632 | zi = ( Gauss76Z[ii]*(vb-va) + vb + va )/2.0; |
---|
633 | // calculate sphere scattering |
---|
634 | //return(3*(sin(qr) - qr*cos(qr))/(qr*qr*qr)); pass qr |
---|
635 | yy = F_func(x*zi)*(4.0*pi/3.0*zi*zi*zi)*delrho; |
---|
636 | yy *= yy; |
---|
637 | yy *= Gauss76Wt[ii] * LogNormal_distr(sig,mu,zi); |
---|
638 | |
---|
639 | summ += yy; //add to the running total of the quadrature |
---|
640 | } |
---|
641 | // calculate value of integral to return |
---|
642 | inten = (vb-va)/2.0*summ; |
---|
643 | |
---|
644 | //re-normalize by polydisperse sphere volume |
---|
645 | r3 = exp(3.0*mu + 9.0/2.0*sig*sig); // <R^3> directly |
---|
646 | inten /= (4.0*pi/3.0*r3); //polydisperse volume |
---|
647 | |
---|
648 | inten *= 1.0e8; |
---|
649 | inten *= scale; |
---|
650 | inten += bkg; |
---|
651 | |
---|
652 | return(inten); |
---|
653 | } |
---|
654 | |
---|
655 | /* |
---|
656 | static double |
---|
657 | LogNormal_distr(double sig, double mu, double pt) |
---|
658 | { |
---|
659 | double retval,pi; |
---|
660 | |
---|
661 | pi = 4.0*atan(1.0); |
---|
662 | retval = (1.0/ (sig*pt*sqrt(2.0*pi)) )*exp( -0.5*(log(pt) - mu)*(log(pt) - mu)/sig/sig ); |
---|
663 | return(retval); |
---|
664 | } |
---|
665 | |
---|
666 | static double |
---|
667 | Gauss_distr(double sig, double avg, double pt) |
---|
668 | { |
---|
669 | double retval,Pi; |
---|
670 | |
---|
671 | Pi = 4.0*atan(1.0); |
---|
672 | retval = (1.0/ (sig*sqrt(2.0*Pi)) )*exp(-(avg-pt)*(avg-pt)/sig/sig/2.0); |
---|
673 | return(retval); |
---|
674 | } |
---|
675 | */ |
---|
676 | |
---|
677 | // scattering from a core shell sphere with a (Schulz) polydisperse core and constant ratio (shell thickness)/(core radius) |
---|
678 | // - the polydispersity is of the WHOLE sphere |
---|
679 | // |
---|
680 | double |
---|
681 | PolyCoreShellRatio(double dp[], double q) |
---|
682 | { |
---|
683 | double pi,x; |
---|
684 | double scale,corrad,thick,shlrad,pp,drho1,drho2,sig,zz,bkg; //my local names |
---|
685 | double sld1,sld2,sld3,zp1,zp2,zp3,vpoly; |
---|
686 | double pi43,c1,c2,form,volume,arg1,arg2; |
---|
687 | |
---|
688 | pi = 4.0*atan(1.0); |
---|
689 | x= q; |
---|
690 | |
---|
691 | scale = dp[0]; |
---|
692 | corrad = dp[1]; |
---|
693 | thick = dp[2]; |
---|
694 | sig = dp[3]; |
---|
695 | sld1 = dp[4]; |
---|
696 | sld2 = dp[5]; |
---|
697 | sld3 = dp[6]; |
---|
698 | bkg = dp[7]; |
---|
699 | |
---|
700 | zz = (1.0/sig)*(1.0/sig) - 1.0; |
---|
701 | shlrad = corrad + thick; |
---|
702 | drho1 = sld1-sld2; //core-shell |
---|
703 | drho2 = sld2-sld3; //shell-solvent |
---|
704 | zp1 = zz + 1.; |
---|
705 | zp2 = zz + 2.; |
---|
706 | zp3 = zz + 3.; |
---|
707 | vpoly = 4.0*pi/3.0*zp3*zp2/zp1/zp1*pow((corrad+thick),3); |
---|
708 | |
---|
709 | // the beta factor is not calculated |
---|
710 | // the calculated form factor <f^2> has units [length^2] |
---|
711 | // and must be multiplied by number density [l^-3] and the correct unit |
---|
712 | // conversion to get to absolute scale |
---|
713 | |
---|
714 | pi43=4.0/3.0*pi; |
---|
715 | pp=corrad/shlrad; |
---|
716 | volume=pi43*shlrad*shlrad*shlrad; |
---|
717 | c1=drho1*volume; |
---|
718 | c2=drho2*volume; |
---|
719 | |
---|
720 | arg1 = x*shlrad*pp; |
---|
721 | arg2 = x*shlrad; |
---|
722 | |
---|
723 | form=pow(pp,6)*c1*c1*fnt2(arg1,zz); |
---|
724 | form += c2*c2*fnt2(arg2,zz); |
---|
725 | form += 2.0*c1*c2*fnt3(arg2,pp,zz); |
---|
726 | |
---|
727 | //convert the result to [cm^-1] |
---|
728 | |
---|
729 | //scale the result |
---|
730 | // - divide by the polydisperse volume, mult by 10^8 |
---|
731 | form /= vpoly; |
---|
732 | form *= 1.0e8; |
---|
733 | form *= scale; |
---|
734 | |
---|
735 | //add in the background |
---|
736 | form += bkg; |
---|
737 | |
---|
738 | return(form); |
---|
739 | } |
---|
740 | |
---|
741 | //cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc |
---|
742 | //c |
---|
743 | //c function fnt2(y,z) |
---|
744 | //c |
---|
745 | double |
---|
746 | fnt2(double yy, double zz) |
---|
747 | { |
---|
748 | double z1,z2,z3,u,ww,term1,term2,term3,ans; |
---|
749 | |
---|
750 | z1=zz+1.0; |
---|
751 | z2=zz+2.0; |
---|
752 | z3=zz+3.0; |
---|
753 | u=yy/z1; |
---|
754 | ww=atan(2.0*u); |
---|
755 | term1=cos(z1*ww)/pow((1.0+4.0*u*u),(z1/2.0)); |
---|
756 | term2=2.0*yy*sin(z2*ww)/pow((1.0+4.0*u*u),(z2/2.0)); |
---|
757 | term3=1.0+cos(z3*ww)/pow((1.0+4.0*u*u),(z3/2.0)); |
---|
758 | ans=(4.50/z1/pow(yy,6))*(z1*(1.0-term1-term2)+yy*yy*z2*term3); |
---|
759 | |
---|
760 | return(ans); |
---|
761 | } |
---|
762 | |
---|
763 | //cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc |
---|
764 | //c |
---|
765 | //c function fnt3(y,p,z) |
---|
766 | //c |
---|
767 | double |
---|
768 | fnt3(double yy, double pp, double zz) |
---|
769 | { |
---|
770 | double z1,z2,z3,yp,yn,up,un,vp,vn,term1,term2,term3,term4,term5,term6,ans; |
---|
771 | |
---|
772 | z1=zz+1.0; |
---|
773 | z2=zz+2.0; |
---|
774 | z3=zz+3.0; |
---|
775 | yp=(1.0+pp)*yy; |
---|
776 | yn=(1.0-pp)*yy; |
---|
777 | up=yp/z1; |
---|
778 | un=yn/z1; |
---|
779 | vp=atan(up); |
---|
780 | vn=atan(un); |
---|
781 | term1=cos(z1*vn)/pow((1.0+un*un),(z1/2.0)); |
---|
782 | term2=cos(z1*vp)/pow((1.0+up*up),(z1/2.0)); |
---|
783 | term3=cos(z3*vn)/pow((1.0+un*un),(z3/2.0)); |
---|
784 | term4=cos(z3*vp)/pow((1.0+up*up),(z3/2.0)); |
---|
785 | term5=yn*sin(z2*vn)/pow((1.0+un*un),(z2/2.0)); |
---|
786 | term6=yp*sin(z2*vp)/pow((1.0+up*up),(z2/2.0)); |
---|
787 | ans=4.5/z1/pow(yy,6); |
---|
788 | ans *=(z1*(term1-term2)+yy*yy*pp*z2*(term3+term4)+z1*(term5-term6)); |
---|
789 | |
---|
790 | return(ans); |
---|
791 | } |
---|
792 | |
---|
793 | // scattering from a a binary population of hard spheres, 3 partial structure factors |
---|
794 | // are properly accounted for... |
---|
795 | // Input (fitting) variables are: |
---|
796 | // larger sphere radius(angstroms) = guess[0] |
---|
797 | // smaller sphere radius (A) = w[1] |
---|
798 | // number fraction of larger spheres = guess[2] |
---|
799 | // total volume fraction of spheres = guess[3] |
---|
800 | // size ratio, alpha(0<a<1) = derived |
---|
801 | // SLD(A-2) of larger particle = guess[4] |
---|
802 | // SLD(A-2) of smaller particle = guess[5] |
---|
803 | // SLD(A-2) of the solvent = guess[6] |
---|
804 | // background = guess[7] |
---|
805 | double |
---|
806 | BinaryHS(double dp[], double q) |
---|
807 | { |
---|
808 | double x,pi; |
---|
809 | double r2,r1,nf2,phi,aa,rho2,rho1,rhos,inten,bgd; //my local names |
---|
810 | double psf11,psf12,psf22; |
---|
811 | double phi1,phi2,phr,a3; |
---|
812 | double v1,v2,n1,n2,qr1,qr2,b1,b2,sc1,sc2; |
---|
813 | int err; |
---|
814 | |
---|
815 | pi = 4.0*atan(1.0); |
---|
816 | x= q; |
---|
817 | r2 = dp[0]; |
---|
818 | r1 = dp[1]; |
---|
819 | phi2 = dp[2]; |
---|
820 | phi1 = dp[3]; |
---|
821 | rho2 = dp[4]; |
---|
822 | rho1 = dp[5]; |
---|
823 | rhos = dp[6]; |
---|
824 | bgd = dp[7]; |
---|
825 | |
---|
826 | |
---|
827 | phi = phi1 + phi2; |
---|
828 | aa = r1/r2; |
---|
829 | //calculate the number fraction of larger spheres (eqn 2 in reference) |
---|
830 | a3=aa*aa*aa; |
---|
831 | phr=phi2/phi; |
---|
832 | nf2 = phr*a3/(1.0-phr+phr*a3); |
---|
833 | // calculate the PSF's here |
---|
834 | err = ashcroft(x,r2,nf2,aa,phi,&psf11,&psf22,&psf12); |
---|
835 | |
---|
836 | // /* do form factor calculations */ |
---|
837 | |
---|
838 | v1 = 4.0*pi/3.0*r1*r1*r1; |
---|
839 | v2 = 4.0*pi/3.0*r2*r2*r2; |
---|
840 | |
---|
841 | n1 = phi1/v1; |
---|
842 | n2 = phi2/v2; |
---|
843 | |
---|
844 | qr1 = r1*x; |
---|
845 | qr2 = r2*x; |
---|
846 | |
---|
847 | if (qr1 == 0){ |
---|
848 | sc1 = 1.0/3.0; |
---|
849 | }else{ |
---|
850 | sc1 = (sin(qr1)-qr1*cos(qr1))/qr1/qr1/qr1; |
---|
851 | } |
---|
852 | if (qr2 == 0){ |
---|
853 | sc2 = 1.0/3.0; |
---|
854 | }else{ |
---|
855 | sc2 = (sin(qr2)-qr2*cos(qr2))/qr2/qr2/qr2; |
---|
856 | } |
---|
857 | b1 = r1*r1*r1*(rho1-rhos)*4.0*pi*sc1; |
---|
858 | b2 = r2*r2*r2*(rho2-rhos)*4.0*pi*sc2; |
---|
859 | inten = n1*b1*b1*psf11; |
---|
860 | inten += sqrt(n1*n2)*2.0*b1*b2*psf12; |
---|
861 | inten += n2*b2*b2*psf22; |
---|
862 | ///* convert I(1/A) to (1/cm) */ |
---|
863 | inten *= 1.0e8; |
---|
864 | |
---|
865 | inten += bgd; |
---|
866 | |
---|
867 | return(inten); |
---|
868 | } |
---|
869 | |
---|
870 | double |
---|
871 | BinaryHS_PSF11(double dp[], double q) |
---|
872 | { |
---|
873 | double x,pi; |
---|
874 | double r2,r1,nf2,phi,aa,rho2,rho1,rhos,bgd; //my local names |
---|
875 | double psf11,psf12,psf22; |
---|
876 | double phi1,phi2,phr,a3; |
---|
877 | int err; |
---|
878 | |
---|
879 | pi = 4.0*atan(1.0); |
---|
880 | x= q; |
---|
881 | r2 = dp[0]; |
---|
882 | r1 = dp[1]; |
---|
883 | phi2 = dp[2]; |
---|
884 | phi1 = dp[3]; |
---|
885 | rho2 = dp[4]; |
---|
886 | rho1 = dp[5]; |
---|
887 | rhos = dp[6]; |
---|
888 | bgd = dp[7]; |
---|
889 | phi = phi1 + phi2; |
---|
890 | aa = r1/r2; |
---|
891 | //calculate the number fraction of larger spheres (eqn 2 in reference) |
---|
892 | a3=aa*aa*aa; |
---|
893 | phr=phi2/phi; |
---|
894 | nf2 = phr*a3/(1.0-phr+phr*a3); |
---|
895 | // calculate the PSF's here |
---|
896 | err = ashcroft(x,r2,nf2,aa,phi,&psf11,&psf22,&psf12); |
---|
897 | |
---|
898 | return(psf11); //scale, and add in the background |
---|
899 | } |
---|
900 | |
---|
901 | double |
---|
902 | BinaryHS_PSF12(double dp[], double q) |
---|
903 | { |
---|
904 | double x,pi; |
---|
905 | double r2,r1,nf2,phi,aa,rho2,rho1,rhos,bgd; //my local names |
---|
906 | double psf11,psf12,psf22; |
---|
907 | double phi1,phi2,phr,a3; |
---|
908 | int err; |
---|
909 | |
---|
910 | pi = 4.0*atan(1.0); |
---|
911 | x= q; |
---|
912 | r2 = dp[0]; |
---|
913 | r1 = dp[1]; |
---|
914 | phi2 = dp[2]; |
---|
915 | phi1 = dp[3]; |
---|
916 | rho2 = dp[4]; |
---|
917 | rho1 = dp[5]; |
---|
918 | rhos = dp[6]; |
---|
919 | bgd = dp[7]; |
---|
920 | phi = phi1 + phi2; |
---|
921 | aa = r1/r2; |
---|
922 | //calculate the number fraction of larger spheres (eqn 2 in reference) |
---|
923 | a3=aa*aa*aa; |
---|
924 | phr=phi2/phi; |
---|
925 | nf2 = phr*a3/(1.0-phr+phr*a3); |
---|
926 | // calculate the PSF's here |
---|
927 | err = ashcroft(x,r2,nf2,aa,phi,&psf11,&psf22,&psf12); |
---|
928 | |
---|
929 | return(psf12); //scale, and add in the background |
---|
930 | } |
---|
931 | |
---|
932 | double |
---|
933 | BinaryHS_PSF22(double dp[], double q) |
---|
934 | { |
---|
935 | double x,pi; |
---|
936 | double r2,r1,nf2,phi,aa,rho2,rho1,rhos,bgd; //my local names |
---|
937 | double psf11,psf12,psf22; |
---|
938 | double phi1,phi2,phr,a3; |
---|
939 | int err; |
---|
940 | |
---|
941 | pi = 4.0*atan(1.0); |
---|
942 | x= q; |
---|
943 | |
---|
944 | r2 = dp[0]; |
---|
945 | r1 = dp[1]; |
---|
946 | phi2 = dp[2]; |
---|
947 | phi1 = dp[3]; |
---|
948 | rho2 = dp[4]; |
---|
949 | rho1 = dp[5]; |
---|
950 | rhos = dp[6]; |
---|
951 | bgd = dp[7]; |
---|
952 | phi = phi1 + phi2; |
---|
953 | aa = r1/r2; |
---|
954 | //calculate the number fraction of larger spheres (eqn 2 in reference) |
---|
955 | a3=aa*aa*aa; |
---|
956 | phr=phi2/phi; |
---|
957 | nf2 = phr*a3/(1.0-phr+phr*a3); |
---|
958 | // calculate the PSF's here |
---|
959 | err = ashcroft(x,r2,nf2,aa,phi,&psf11,&psf22,&psf12); |
---|
960 | |
---|
961 | return(psf22); //scale, and add in the background |
---|
962 | } |
---|
963 | |
---|
964 | int |
---|
965 | ashcroft(double qval, double r2, double nf2, double aa, double phi, double *s11, double *s22, double *s12) |
---|
966 | { |
---|
967 | // variable qval,r2,nf2,aa,phi,&s11,&s22,&s12 |
---|
968 | |
---|
969 | // calculate constant terms |
---|
970 | double s1,s2,v,a3,v1,v2,g11,g12,g22,wmv,wmv3,wmv4; |
---|
971 | double a1,a2i,a2,b1,b2,b12,gm1,gm12; |
---|
972 | double err=0.0,yy,ay,ay2,ay3,t1,t2,t3,f11,y2,y3,tt1,tt2,tt3; |
---|
973 | double c11,c22,c12,f12,f22,ttt1,ttt2,ttt3,ttt4,yl,y13; |
---|
974 | double t21,t22,t23,t31,t32,t33,t41,t42,yl3,wma3,y1; |
---|
975 | |
---|
976 | s2 = 2.0*r2; |
---|
977 | s1 = aa*s2; |
---|
978 | v = phi; |
---|
979 | a3 = aa*aa*aa; |
---|
980 | v1=((1.-nf2)*a3/(nf2+(1.-nf2)*a3))*v; |
---|
981 | v2=(nf2/(nf2+(1.-nf2)*a3))*v; |
---|
982 | g11=((1.+.5*v)+1.5*v2*(aa-1.))/(1.-v)/(1.-v); |
---|
983 | g22=((1.+.5*v)+1.5*v1*(1./aa-1.))/(1.-v)/(1.-v); |
---|
984 | g12=((1.+.5*v)+1.5*(1.-aa)*(v1-v2)/(1.+aa))/(1.-v)/(1.-v); |
---|
985 | wmv = 1/(1.-v); |
---|
986 | wmv3 = wmv*wmv*wmv; |
---|
987 | wmv4 = wmv*wmv3; |
---|
988 | a1=3.*wmv4*((v1+a3*v2)*(1.+v+v*v)-3.*v1*v2*(1.-aa)*(1.-aa)*(1.+v1+aa*(1.+v2))) + ((v1+a3*v2)*(1.+2.*v)+(1.+v+v*v)-3.*v1*v2*(1.-aa)*(1.-aa)-3.*v2*(1.-aa)*(1.-aa)*(1.+v1+aa*(1.+v2)))*wmv3; |
---|
989 | a2i=((v1+a3*v2)*(1.+v+v*v)-3.*v1*v2*(1.-aa)*(1.-aa)*(1.+v1+aa*(1.+v2)))*3*wmv4 + ((v1+a3*v2)*(1.+2.*v)+a3*(1.+v+v*v)-3.*v1*v2*(1.-aa)*(1.-aa)*aa-3.*v1*(1.-aa)*(1.-aa)*(1.+v1+aa*(1.+v2)))*wmv3; |
---|
990 | a2=a2i/a3; |
---|
991 | b1=-6.*(v1*g11*g11+.25*v2*(1.+aa)*(1.+aa)*aa*g12*g12); |
---|
992 | b2=-6.*(v2*g22*g22+.25*v1/a3*(1.+aa)*(1.+aa)*g12*g12); |
---|
993 | b12=-3.*aa*(1.+aa)*(v1*g11/aa/aa+v2*g22)*g12; |
---|
994 | gm1=(v1*a1+a3*v2*a2)*.5; |
---|
995 | gm12=2.*gm1*(1.-aa)/aa; |
---|
996 | //c |
---|
997 | //c calculate the direct correlation functions and print results |
---|
998 | //c |
---|
999 | // do 20 j=1,npts |
---|
1000 | |
---|
1001 | yy=qval*s2; |
---|
1002 | //c calculate direct correlation functions |
---|
1003 | //c ----c11 |
---|
1004 | ay=aa*yy; |
---|
1005 | ay2 = ay*ay; |
---|
1006 | ay3 = ay*ay*ay; |
---|
1007 | t1=a1*(sin(ay)-ay*cos(ay)); |
---|
1008 | t2=b1*(2.*ay*sin(ay)-(ay2-2.)*cos(ay)-2.)/ay; |
---|
1009 | t3=gm1*((4.*ay*ay2-24.*ay)*sin(ay)-(ay2*ay2-12.*ay2+24.)*cos(ay)+24.)/ay3; |
---|
1010 | f11=24.*v1*(t1+t2+t3)/ay3; |
---|
1011 | |
---|
1012 | //c ------c22 |
---|
1013 | y2=yy*yy; |
---|
1014 | y3=yy*y2; |
---|
1015 | tt1=a2*(sin(yy)-yy*cos(yy)); |
---|
1016 | tt2=b2*(2.*yy*sin(yy)-(y2-2.)*cos(yy)-2.)/yy; |
---|
1017 | tt3=gm1*((4.*y3-24.*yy)*sin(yy)-(y2*y2-12.*y2+24.)*cos(yy)+24.)/ay3; |
---|
1018 | f22=24.*v2*(tt1+tt2+tt3)/y3; |
---|
1019 | |
---|
1020 | //c -----c12 |
---|
1021 | yl=.5*yy*(1.-aa); |
---|
1022 | yl3=yl*yl*yl; |
---|
1023 | wma3 = (1.-aa)*(1.-aa)*(1.-aa); |
---|
1024 | y1=aa*yy; |
---|
1025 | y13 = y1*y1*y1; |
---|
1026 | ttt1=3.*wma3*v*sqrt(nf2)*sqrt(1.-nf2)*a1*(sin(yl)-yl*cos(yl))/((nf2+(1.-nf2)*a3)*yl3); |
---|
1027 | t21=b12*(2.*y1*cos(y1)+(y1*y1-2.)*sin(y1)); |
---|
1028 | t22=gm12*((3.*y1*y1-6.)*cos(y1)+(y1*y1*y1-6.*y1)*sin(y1)+6.)/y1; |
---|
1029 | t23=gm1*((4.*y13-24.*y1)*cos(y1)+(y13*y1-12.*y1*y1+24.)*sin(y1))/(y1*y1); |
---|
1030 | t31=b12*(2.*y1*sin(y1)-(y1*y1-2.)*cos(y1)-2.); |
---|
1031 | t32=gm12*((3.*y1*y1-6.)*sin(y1)-(y1*y1*y1-6.*y1)*cos(y1))/y1; |
---|
1032 | t33=gm1*((4.*y13-24.*y1)*sin(y1)-(y13*y1-12.*y1*y1+24.)*cos(y1)+24.)/(y1*y1); |
---|
1033 | t41=cos(yl)*((sin(y1)-y1*cos(y1))/(y1*y1) + (1.-aa)/(2.*aa)*(1.-cos(y1))/y1); |
---|
1034 | t42=sin(yl)*((cos(y1)+y1*sin(y1)-1.)/(y1*y1) + (1.-aa)/(2.*aa)*sin(y1)/y1); |
---|
1035 | ttt2=sin(yl)*(t21+t22+t23)/(y13*y1); |
---|
1036 | ttt3=cos(yl)*(t31+t32+t33)/(y13*y1); |
---|
1037 | ttt4=a1*(t41+t42)/y1; |
---|
1038 | f12=ttt1+24.*v*sqrt(nf2)*sqrt(1.-nf2)*a3*(ttt2+ttt3+ttt4)/(nf2+(1.-nf2)*a3); |
---|
1039 | |
---|
1040 | c11=f11; |
---|
1041 | c22=f22; |
---|
1042 | c12=f12; |
---|
1043 | *s11=1./(1.+c11-(c12)*c12/(1.+c22)); |
---|
1044 | *s22=1./(1.+c22-(c12)*c12/(1.+c11)); |
---|
1045 | *s12=-c12/((1.+c11)*(1.+c22)-(c12)*(c12)); |
---|
1046 | |
---|
1047 | return(err); |
---|
1048 | } |
---|
1049 | |
---|
1050 | |
---|
1051 | |
---|
1052 | /* |
---|
1053 | // calculates the scattering from a spherical particle made up of a core (aqueous) surrounded |
---|
1054 | // by N spherical layers, each of which is a PAIR of shells, solvent + surfactant since there |
---|
1055 | //must always be a surfactant layer on the outside |
---|
1056 | // |
---|
1057 | // bragg peaks arise naturally from the periodicity of the sample |
---|
1058 | // resolution smeared version gives he most appropriate view of the model |
---|
1059 | |
---|
1060 | Warning: |
---|
1061 | The call to WaveData() below returns a pointer to the middle |
---|
1062 | of an unlocked Macintosh handle. In the unlikely event that your |
---|
1063 | calculations could cause memory to move, you should copy the coefficient |
---|
1064 | values to local variables or an array before such operations. |
---|
1065 | */ |
---|
1066 | double |
---|
1067 | MultiShell(double dp[], double q) |
---|
1068 | { |
---|
1069 | double x; |
---|
1070 | double scale,rcore,tw,ts,rhocore,rhoshel,num,bkg; //my local names |
---|
1071 | int ii; |
---|
1072 | double fval,voli,ri,sldi; |
---|
1073 | double pi; |
---|
1074 | |
---|
1075 | pi = 4.0*atan(1.0); |
---|
1076 | |
---|
1077 | x= q; |
---|
1078 | scale = dp[0]; |
---|
1079 | rcore = dp[1]; |
---|
1080 | ts = dp[2]; |
---|
1081 | tw = dp[3]; |
---|
1082 | rhocore = dp[4]; |
---|
1083 | rhoshel = dp[5]; |
---|
1084 | num = dp[6]; |
---|
1085 | bkg = dp[7]; |
---|
1086 | |
---|
1087 | //calculate with a loop, two shells at a time |
---|
1088 | |
---|
1089 | ii=0; |
---|
1090 | fval=0.0; |
---|
1091 | |
---|
1092 | do { |
---|
1093 | ri = rcore + (double)ii*ts + (double)ii*tw; |
---|
1094 | voli = 4.0*pi/3.0*ri*ri*ri; |
---|
1095 | sldi = rhocore-rhoshel; |
---|
1096 | fval += voli*sldi*F_func(ri*x); |
---|
1097 | ri += ts; |
---|
1098 | voli = 4.0*pi/3.0*ri*ri*ri; |
---|
1099 | sldi = rhoshel-rhocore; |
---|
1100 | fval += voli*sldi*F_func(ri*x); |
---|
1101 | ii+=1; //do 2 layers at a time |
---|
1102 | } while(ii<=num-1); //change to make 0 < num < 2 correspond to unilamellar vesicles (C. Glinka, 11/24/03) |
---|
1103 | |
---|
1104 | fval *= fval; //square it |
---|
1105 | fval /= voli; //normalize by the overall volume |
---|
1106 | fval *= scale*1.0e8; |
---|
1107 | fval += bkg; |
---|
1108 | |
---|
1109 | return(fval); |
---|
1110 | } |
---|
1111 | |
---|
1112 | /* |
---|
1113 | // calculates the scattering from a POLYDISPERSE spherical particle made up of a core (aqueous) surrounded |
---|
1114 | // by N spherical layers, each of which is a PAIR of shells, solvent + surfactant since there |
---|
1115 | //must always be a surfactant layer on the outside |
---|
1116 | // |
---|
1117 | // bragg peaks arise naturally from the periodicity of the sample |
---|
1118 | // resolution smeared version gives he most appropriate view of the model |
---|
1119 | // |
---|
1120 | // Polydispersity is of the total (outer) radius. This is converted into a distribution of MLV's |
---|
1121 | // with integer numbers of layers, with a minimum of one layer... a vesicle... depending |
---|
1122 | // on the parameters, the "distribution" of MLV's that is used may be truncated |
---|
1123 | // |
---|
1124 | Warning: |
---|
1125 | The call to WaveData() below returns a pointer to the middle |
---|
1126 | of an unlocked Macintosh handle. In the unlikely event that your |
---|
1127 | calculations could cause memory to move, you should copy the coefficient |
---|
1128 | values to local variables or an array before such operations. |
---|
1129 | */ |
---|
1130 | double |
---|
1131 | PolyMultiShell(double dp[], double q) |
---|
1132 | { |
---|
1133 | double x; |
---|
1134 | double scale,rcore,tw,ts,rhocore,rhoshel,bkg; //my local names |
---|
1135 | int ii,minPairs,maxPairs,first; |
---|
1136 | double fval,ri,pi; |
---|
1137 | double avg,pd,zz,lo,hi,r1,r2,d1,d2,distr; |
---|
1138 | |
---|
1139 | pi = 4.0*atan(1.0); |
---|
1140 | x= q; |
---|
1141 | |
---|
1142 | scale = dp[0]; |
---|
1143 | avg = dp[1]; // average (total) outer radius |
---|
1144 | pd = dp[2]; |
---|
1145 | rcore = dp[3]; |
---|
1146 | ts = dp[4]; |
---|
1147 | tw = dp[5]; |
---|
1148 | rhocore = dp[6]; |
---|
1149 | rhoshel = dp[7]; |
---|
1150 | bkg = dp[8]; |
---|
1151 | |
---|
1152 | zz = (1.0/pd)*(1.0/pd)-1.0; |
---|
1153 | |
---|
1154 | //max radius set to be 5 std deviations past mean |
---|
1155 | hi = avg + pd*avg*5.0; |
---|
1156 | lo = avg - pd*avg*5.0; |
---|
1157 | |
---|
1158 | maxPairs = trunc( (hi-rcore+tw)/(ts+tw) ); |
---|
1159 | minPairs = trunc( (lo-rcore+tw)/(ts+tw) ); |
---|
1160 | minPairs = (minPairs < 1) ? 1 : minPairs; // need a minimum of one |
---|
1161 | |
---|
1162 | ii=minPairs; |
---|
1163 | fval=0.0; |
---|
1164 | d1 = 0.0; |
---|
1165 | d2 = 0.0; |
---|
1166 | r1 = 0.0; |
---|
1167 | r2 = 0.0; |
---|
1168 | distr = 0.0; |
---|
1169 | first = 1.0; |
---|
1170 | do { |
---|
1171 | //make the current values old |
---|
1172 | r1 = r2; |
---|
1173 | d1 = d2; |
---|
1174 | |
---|
1175 | ri = (double)ii*(ts+tw) - tw + rcore; |
---|
1176 | fval += SchulzPoint(ri,avg,zz) * MultiShellGuts(x, rcore, ts, tw, rhocore, rhoshel, ii) * (4*pi/3*ri*ri*ri); |
---|
1177 | // get a running integration of the fraction of the distribution used, but not the first time |
---|
1178 | r2 = ri; |
---|
1179 | d2 = SchulzPoint(ri,avg,zz); |
---|
1180 | if( !first ) { |
---|
1181 | distr += 0.5*(d1+d2)*(r2-r1); //cheap trapezoidal integration |
---|
1182 | } |
---|
1183 | ii+=1; |
---|
1184 | first = 0; |
---|
1185 | } while(ii<=maxPairs); |
---|
1186 | |
---|
1187 | fval /= 4.0*pi/3.0*avg*avg*avg; //normalize by the overall volume |
---|
1188 | fval /= distr; |
---|
1189 | fval *= scale; |
---|
1190 | fval += bkg; |
---|
1191 | |
---|
1192 | return(fval); |
---|
1193 | } |
---|
1194 | |
---|
1195 | double |
---|
1196 | MultiShellGuts(double x,double rcore,double ts,double tw,double rhocore,double rhoshel,int num) { |
---|
1197 | |
---|
1198 | double ri,sldi,fval,voli,pi; |
---|
1199 | int ii; |
---|
1200 | |
---|
1201 | pi = 4.0*atan(1.0); |
---|
1202 | ii=0; |
---|
1203 | fval=0.0; |
---|
1204 | |
---|
1205 | do { |
---|
1206 | ri = rcore + (double)ii*ts + (double)ii*tw; |
---|
1207 | voli = 4.0*pi/3.0*ri*ri*ri; |
---|
1208 | sldi = rhocore-rhoshel; |
---|
1209 | fval += voli*sldi*F_func(ri*x); |
---|
1210 | ri += ts; |
---|
1211 | voli = 4.0*pi/3.0*ri*ri*ri; |
---|
1212 | sldi = rhoshel-rhocore; |
---|
1213 | fval += voli*sldi*F_func(ri*x); |
---|
1214 | ii+=1; //do 2 layers at a time |
---|
1215 | } while(ii<=num-1); //change to make 0 < num < 2 correspond to unilamellar vesicles (C. Glinka, 11/24/03) |
---|
1216 | |
---|
1217 | fval *= fval; |
---|
1218 | fval /= voli; |
---|
1219 | fval *= 1.0e8; |
---|
1220 | |
---|
1221 | return(fval); // this result still needs to be multiplied by scale and have background added |
---|
1222 | } |
---|
1223 | |
---|
1224 | /* |
---|
1225 | static double |
---|
1226 | SchulzPoint(double x, double avg, double zz) { |
---|
1227 | |
---|
1228 | double dr; |
---|
1229 | |
---|
1230 | dr = zz*log(x) - gammln(zz+1.0)+(zz+1.0)*log((zz+1.0)/avg)-(x/avg*(zz+1.0)); |
---|
1231 | return (exp(dr)); |
---|
1232 | } |
---|
1233 | |
---|
1234 | static double |
---|
1235 | gammln(double xx) { |
---|
1236 | |
---|
1237 | double x,y,tmp,ser; |
---|
1238 | static double cof[6]={76.18009172947146,-86.50532032941677, |
---|
1239 | 24.01409824083091,-1.231739572450155, |
---|
1240 | 0.1208650973866179e-2,-0.5395239384953e-5}; |
---|
1241 | int j; |
---|
1242 | |
---|
1243 | y=x=xx; |
---|
1244 | tmp=x+5.5; |
---|
1245 | tmp -= (x+0.5)*log(tmp); |
---|
1246 | ser=1.000000000190015; |
---|
1247 | for (j=0;j<=5;j++) ser += cof[j]/++y; |
---|
1248 | return -tmp+log(2.5066282746310005*ser/x); |
---|
1249 | } |
---|
1250 | */ |
---|
1251 | |
---|
1252 | double |
---|
1253 | F_func(double qr) { |
---|
1254 | double sc; |
---|
1255 | if (qr == 0.0){ |
---|
1256 | sc = 1.0; |
---|
1257 | }else{ |
---|
1258 | sc=(3.0*(sin(qr) - qr*cos(qr))/(qr*qr*qr)); |
---|
1259 | } |
---|
1260 | return sc; |
---|
1261 | } |
---|
1262 | |
---|
1263 | double |
---|
1264 | OneShell(double dp[], double q) |
---|
1265 | { |
---|
1266 | // variables are: |
---|
1267 | //[0] scale factor |
---|
1268 | //[1] radius of core [ᅵ] |
---|
1269 | //[2] SLD of the core [ᅵ-2] |
---|
1270 | //[3] thickness of the shell [ᅵ] |
---|
1271 | //[4] SLD of the shell |
---|
1272 | //[5] SLD of the solvent |
---|
1273 | //[6] background [cm-1] |
---|
1274 | |
---|
1275 | double x,pi; |
---|
1276 | double scale,rcore,thick,rhocore,rhoshel,rhosolv,bkg; //my local names |
---|
1277 | double bes,f,vol,qr,contr,f2; |
---|
1278 | |
---|
1279 | pi = 4.0*atan(1.0); |
---|
1280 | x=q; |
---|
1281 | |
---|
1282 | scale = dp[0]; |
---|
1283 | rcore = dp[1]; |
---|
1284 | rhocore = dp[2]; |
---|
1285 | thick = dp[3]; |
---|
1286 | rhoshel = dp[4]; |
---|
1287 | rhosolv = dp[5]; |
---|
1288 | bkg = dp[6]; |
---|
1289 | |
---|
1290 | // core first, then add in shell |
---|
1291 | qr=x*rcore; |
---|
1292 | contr = rhocore-rhoshel; |
---|
1293 | if(qr == 0){ |
---|
1294 | bes = 1.0; |
---|
1295 | }else{ |
---|
1296 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1297 | } |
---|
1298 | vol = 4.0*pi/3.0*rcore*rcore*rcore; |
---|
1299 | f = vol*bes*contr; |
---|
1300 | //now the shell |
---|
1301 | qr=x*(rcore+thick); |
---|
1302 | contr = rhoshel-rhosolv; |
---|
1303 | if(qr == 0){ |
---|
1304 | bes = 1.0; |
---|
1305 | }else{ |
---|
1306 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1307 | } |
---|
1308 | vol = 4.0*pi/3.0*pow((rcore+thick),3); |
---|
1309 | f += vol*bes*contr; |
---|
1310 | |
---|
1311 | // normalize to particle volume and rescale from [ᅵ-1] to [cm-1] |
---|
1312 | f2 = f*f/vol*1.0e8; |
---|
1313 | |
---|
1314 | //scale if desired |
---|
1315 | f2 *= scale; |
---|
1316 | // then add in the background |
---|
1317 | f2 += bkg; |
---|
1318 | |
---|
1319 | return(f2); |
---|
1320 | } |
---|
1321 | |
---|
1322 | double |
---|
1323 | TwoShell(double dp[], double q) |
---|
1324 | { |
---|
1325 | // variables are: |
---|
1326 | //[0] scale factor |
---|
1327 | //[1] radius of core [ᅵ] |
---|
1328 | //[2] SLD of the core [ᅵ-2] |
---|
1329 | //[3] thickness of shell 1 [ᅵ] |
---|
1330 | //[4] SLD of shell 1 |
---|
1331 | //[5] thickness of shell 2 [ᅵ] |
---|
1332 | //[6] SLD of shell 2 |
---|
1333 | //[7] SLD of the solvent |
---|
1334 | //[8] background [cm-1] |
---|
1335 | |
---|
1336 | double x,pi; |
---|
1337 | double scale,rcore,thick1,rhocore,rhoshel1,rhosolv,bkg; //my local names |
---|
1338 | double bes,f,vol,qr,contr,f2; |
---|
1339 | double rhoshel2,thick2; |
---|
1340 | |
---|
1341 | pi = 4.0*atan(1.0); |
---|
1342 | x=q; |
---|
1343 | |
---|
1344 | scale = dp[0]; |
---|
1345 | rcore = dp[1]; |
---|
1346 | rhocore = dp[2]; |
---|
1347 | thick1 = dp[3]; |
---|
1348 | rhoshel1 = dp[4]; |
---|
1349 | thick2 = dp[5]; |
---|
1350 | rhoshel2 = dp[6]; |
---|
1351 | rhosolv = dp[7]; |
---|
1352 | bkg = dp[8]; |
---|
1353 | // core first, then add in shells |
---|
1354 | qr=x*rcore; |
---|
1355 | contr = rhocore-rhoshel1; |
---|
1356 | if(qr == 0){ |
---|
1357 | bes = 1.0; |
---|
1358 | }else{ |
---|
1359 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1360 | } |
---|
1361 | vol = 4.0*pi/3.0*rcore*rcore*rcore; |
---|
1362 | f = vol*bes*contr; |
---|
1363 | //now the shell (1) |
---|
1364 | qr=x*(rcore+thick1); |
---|
1365 | contr = rhoshel1-rhoshel2; |
---|
1366 | if(qr == 0){ |
---|
1367 | bes = 1.0; |
---|
1368 | }else{ |
---|
1369 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1370 | } |
---|
1371 | vol = 4.0*pi/3.0*(rcore+thick1)*(rcore+thick1)*(rcore+thick1); |
---|
1372 | f += vol*bes*contr; |
---|
1373 | //now the shell (2) |
---|
1374 | qr=x*(rcore+thick1+thick2); |
---|
1375 | contr = rhoshel2-rhosolv; |
---|
1376 | if(qr == 0){ |
---|
1377 | bes = 1.0; |
---|
1378 | }else{ |
---|
1379 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1380 | } |
---|
1381 | vol = 4.0*pi/3.0*(rcore+thick1+thick2)*(rcore+thick1+thick2)*(rcore+thick1+thick2); |
---|
1382 | f += vol*bes*contr; |
---|
1383 | |
---|
1384 | |
---|
1385 | // normalize to particle volume and rescale from [ᅵ-1] to [cm-1] |
---|
1386 | f2 = f*f/vol*1.0e8; |
---|
1387 | |
---|
1388 | //scale if desired |
---|
1389 | f2 *= scale; |
---|
1390 | // then add in the background |
---|
1391 | f2 += bkg; |
---|
1392 | |
---|
1393 | return(f2); |
---|
1394 | } |
---|
1395 | |
---|
1396 | double |
---|
1397 | ThreeShell(double dp[], double q) |
---|
1398 | { |
---|
1399 | // variables are: |
---|
1400 | //[0] scale factor |
---|
1401 | //[1] radius of core [ᅵ] |
---|
1402 | //[2] SLD of the core [ᅵ-2] |
---|
1403 | //[3] thickness of shell 1 [ᅵ] |
---|
1404 | //[4] SLD of shell 1 |
---|
1405 | //[5] thickness of shell 2 [ᅵ] |
---|
1406 | //[6] SLD of shell 2 |
---|
1407 | //[7] thickness of shell 3 |
---|
1408 | //[8] SLD of shell 3 |
---|
1409 | //[9] SLD of solvent |
---|
1410 | //[10] background [cm-1] |
---|
1411 | |
---|
1412 | double x,pi; |
---|
1413 | double scale,rcore,thick1,rhocore,rhoshel1,rhosolv,bkg; //my local names |
---|
1414 | double bes,f,vol,qr,contr,f2; |
---|
1415 | double rhoshel2,thick2,rhoshel3,thick3; |
---|
1416 | |
---|
1417 | pi = 4.0*atan(1.0); |
---|
1418 | x=q; |
---|
1419 | |
---|
1420 | scale = dp[0]; |
---|
1421 | rcore = dp[1]; |
---|
1422 | rhocore = dp[2]; |
---|
1423 | thick1 = dp[3]; |
---|
1424 | rhoshel1 = dp[4]; |
---|
1425 | thick2 = dp[5]; |
---|
1426 | rhoshel2 = dp[6]; |
---|
1427 | thick3 = dp[7]; |
---|
1428 | rhoshel3 = dp[8]; |
---|
1429 | rhosolv = dp[9]; |
---|
1430 | bkg = dp[10]; |
---|
1431 | |
---|
1432 | // core first, then add in shells |
---|
1433 | qr=x*rcore; |
---|
1434 | contr = rhocore-rhoshel1; |
---|
1435 | if(qr == 0){ |
---|
1436 | bes = 1.0; |
---|
1437 | }else{ |
---|
1438 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1439 | } |
---|
1440 | vol = 4.0*pi/3.0*rcore*rcore*rcore; |
---|
1441 | f = vol*bes*contr; |
---|
1442 | //now the shell (1) |
---|
1443 | qr=x*(rcore+thick1); |
---|
1444 | contr = rhoshel1-rhoshel2; |
---|
1445 | if(qr == 0){ |
---|
1446 | bes = 1.0; |
---|
1447 | }else{ |
---|
1448 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1449 | } |
---|
1450 | vol = 4.0*pi/3.0*(rcore+thick1)*(rcore+thick1)*(rcore+thick1); |
---|
1451 | f += vol*bes*contr; |
---|
1452 | //now the shell (2) |
---|
1453 | qr=x*(rcore+thick1+thick2); |
---|
1454 | contr = rhoshel2-rhoshel3; |
---|
1455 | if(qr == 0){ |
---|
1456 | bes = 1.0; |
---|
1457 | }else{ |
---|
1458 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1459 | } |
---|
1460 | vol = 4.0*pi/3.0*(rcore+thick1+thick2)*(rcore+thick1+thick2)*(rcore+thick1+thick2); |
---|
1461 | f += vol*bes*contr; |
---|
1462 | //now the shell (3) |
---|
1463 | qr=x*(rcore+thick1+thick2+thick3); |
---|
1464 | contr = rhoshel3-rhosolv; |
---|
1465 | if(qr == 0){ |
---|
1466 | bes = 1.0; |
---|
1467 | }else{ |
---|
1468 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1469 | } |
---|
1470 | vol = 4.0*pi/3.0*(rcore+thick1+thick2+thick3)*(rcore+thick1+thick2+thick3)*(rcore+thick1+thick2+thick3); |
---|
1471 | f += vol*bes*contr; |
---|
1472 | |
---|
1473 | // normalize to particle volume and rescale from [ᅵ-1] to [cm-1] |
---|
1474 | f2 = f*f/vol*1.0e8; |
---|
1475 | |
---|
1476 | //scale if desired |
---|
1477 | f2 *= scale; |
---|
1478 | // then add in the background |
---|
1479 | f2 += bkg; |
---|
1480 | |
---|
1481 | return(f2); |
---|
1482 | } |
---|
1483 | |
---|
1484 | double |
---|
1485 | FourShell(double dp[], double q) |
---|
1486 | { |
---|
1487 | // variables are: |
---|
1488 | //[0] scale factor |
---|
1489 | //[1] radius of core [ᅵ] |
---|
1490 | //[2] SLD of the core [ᅵ-2] |
---|
1491 | //[3] thickness of shell 1 [ᅵ] |
---|
1492 | //[4] SLD of shell 1 |
---|
1493 | //[5] thickness of shell 2 [ᅵ] |
---|
1494 | //[6] SLD of shell 2 |
---|
1495 | //[7] thickness of shell 3 |
---|
1496 | //[8] SLD of shell 3 |
---|
1497 | //[9] thickness of shell 3 |
---|
1498 | //[10] SLD of shell 3 |
---|
1499 | //[11] SLD of solvent |
---|
1500 | //[12] background [cm-1] |
---|
1501 | |
---|
1502 | double x,pi; |
---|
1503 | double scale,rcore,thick1,rhocore,rhoshel1,rhosolv,bkg; //my local names |
---|
1504 | double bes,f,vol,qr,contr,f2; |
---|
1505 | double rhoshel2,thick2,rhoshel3,thick3,rhoshel4,thick4; |
---|
1506 | |
---|
1507 | pi = 4.0*atan(1.0); |
---|
1508 | x=q; |
---|
1509 | |
---|
1510 | scale = dp[0]; |
---|
1511 | rcore = dp[1]; |
---|
1512 | rhocore = dp[2]; |
---|
1513 | thick1 = dp[3]; |
---|
1514 | rhoshel1 = dp[4]; |
---|
1515 | thick2 = dp[5]; |
---|
1516 | rhoshel2 = dp[6]; |
---|
1517 | thick3 = dp[7]; |
---|
1518 | rhoshel3 = dp[8]; |
---|
1519 | thick4 = dp[9]; |
---|
1520 | rhoshel4 = dp[10]; |
---|
1521 | rhosolv = dp[11]; |
---|
1522 | bkg = dp[12]; |
---|
1523 | |
---|
1524 | // core first, then add in shells |
---|
1525 | qr=x*rcore; |
---|
1526 | contr = rhocore-rhoshel1; |
---|
1527 | if(qr == 0){ |
---|
1528 | bes = 1.0; |
---|
1529 | }else{ |
---|
1530 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1531 | } |
---|
1532 | vol = 4.0*pi/3.0*rcore*rcore*rcore; |
---|
1533 | f = vol*bes*contr; |
---|
1534 | //now the shell (1) |
---|
1535 | qr=x*(rcore+thick1); |
---|
1536 | contr = rhoshel1-rhoshel2; |
---|
1537 | if(qr == 0){ |
---|
1538 | bes = 1.0; |
---|
1539 | }else{ |
---|
1540 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1541 | } |
---|
1542 | vol = 4.0*pi/3.0*(rcore+thick1)*(rcore+thick1)*(rcore+thick1); |
---|
1543 | f += vol*bes*contr; |
---|
1544 | //now the shell (2) |
---|
1545 | qr=x*(rcore+thick1+thick2); |
---|
1546 | contr = rhoshel2-rhoshel3; |
---|
1547 | if(qr == 0){ |
---|
1548 | bes = 1.0; |
---|
1549 | }else{ |
---|
1550 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1551 | } |
---|
1552 | vol = 4.0*pi/3.0*(rcore+thick1+thick2)*(rcore+thick1+thick2)*(rcore+thick1+thick2); |
---|
1553 | f += vol*bes*contr; |
---|
1554 | //now the shell (3) |
---|
1555 | qr=x*(rcore+thick1+thick2+thick3); |
---|
1556 | contr = rhoshel3-rhoshel4; |
---|
1557 | if(qr == 0){ |
---|
1558 | bes = 1.0; |
---|
1559 | }else{ |
---|
1560 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1561 | } |
---|
1562 | vol = 4.0*pi/3.0*(rcore+thick1+thick2+thick3)*(rcore+thick1+thick2+thick3)*(rcore+thick1+thick2+thick3); |
---|
1563 | f += vol*bes*contr; |
---|
1564 | //now the shell (4) |
---|
1565 | qr=x*(rcore+thick1+thick2+thick3+thick4); |
---|
1566 | contr = rhoshel4-rhosolv; |
---|
1567 | if(qr == 0){ |
---|
1568 | bes = 1.0; |
---|
1569 | }else{ |
---|
1570 | bes = 3.0*(sin(qr)-qr*cos(qr))/(qr*qr*qr); |
---|
1571 | } |
---|
1572 | vol = 4.0*pi/3.0*(rcore+thick1+thick2+thick3+thick4)*(rcore+thick1+thick2+thick3+thick4)*(rcore+thick1+thick2+thick3+thick4); |
---|
1573 | f += vol*bes*contr; |
---|
1574 | |
---|
1575 | |
---|
1576 | // normalize to particle volume and rescale from [ᅵ-1] to [cm-1] |
---|
1577 | f2 = f*f/vol*1.0e8; |
---|
1578 | |
---|
1579 | //scale if desired |
---|
1580 | f2 *= scale; |
---|
1581 | // then add in the background |
---|
1582 | f2 += bkg; |
---|
1583 | |
---|
1584 | return(f2); |
---|
1585 | } |
---|
1586 | |
---|
1587 | double |
---|
1588 | PolyOneShell(double dp[], double x) |
---|
1589 | { |
---|
1590 | double scale,rcore,thick,rhocore,rhoshel,rhosolv,bkg,pd,zz; //my local names |
---|
1591 | double va,vb,summ,yyy,zi; |
---|
1592 | double answer,zp1,zp2,zp3,vpoly,range,temp_1sf[7],pi; |
---|
1593 | int nord=76,ii; |
---|
1594 | |
---|
1595 | pi = 4.0*atan(1.0); |
---|
1596 | |
---|
1597 | scale = dp[0]; |
---|
1598 | rcore = dp[1]; |
---|
1599 | pd = dp[2]; |
---|
1600 | rhocore = dp[3]; |
---|
1601 | thick = dp[4]; |
---|
1602 | rhoshel = dp[5]; |
---|
1603 | rhosolv = dp[6]; |
---|
1604 | bkg = dp[7]; |
---|
1605 | |
---|
1606 | zz = (1.0/pd)*(1.0/pd)-1.0; //polydispersity of the core only |
---|
1607 | |
---|
1608 | range = 8.0; //std deviations for the integration |
---|
1609 | va = rcore*(1.0-range*pd); |
---|
1610 | if (va<0.0) { |
---|
1611 | va=0.0; //otherwise numerical error when pd >= 0.3, making a<0 |
---|
1612 | } |
---|
1613 | if (pd>0.3) { |
---|
1614 | range = range + (pd-0.3)*18.0; //stretch upper range to account for skewed tail |
---|
1615 | } |
---|
1616 | vb = rcore*(1.0+range*pd); // is this far enough past avg radius? |
---|
1617 | |
---|
1618 | //temp set scale=1 and bkg=0 for quadrature calc |
---|
1619 | temp_1sf[0] = 1.0; |
---|
1620 | temp_1sf[1] = dp[1]; //the core radius will be changed in the loop |
---|
1621 | temp_1sf[2] = dp[3]; |
---|
1622 | temp_1sf[3] = dp[4]; |
---|
1623 | temp_1sf[4] = dp[5]; |
---|
1624 | temp_1sf[5] = dp[6]; |
---|
1625 | temp_1sf[6] = 0.0; |
---|
1626 | |
---|
1627 | summ = 0.0; // initialize integral |
---|
1628 | for(ii=0;ii<nord;ii+=1) { |
---|
1629 | // calculate Gauss points on integration interval (r-value for evaluation) |
---|
1630 | zi = ( Gauss76Z[ii]*(vb-va) + vb + va )/2.0; |
---|
1631 | temp_1sf[1] = zi; |
---|
1632 | yyy = Gauss76Wt[ii] * SchulzPoint(zi,rcore,zz) * OneShell(temp_1sf,x); |
---|
1633 | //un-normalize by volume |
---|
1634 | yyy *= 4.0*pi/3.0*pow((zi+thick),3); |
---|
1635 | summ += yyy; //add to the running total of the quadrature |
---|
1636 | } |
---|
1637 | // calculate value of integral to return |
---|
1638 | answer = (vb-va)/2.0*summ; |
---|
1639 | |
---|
1640 | //re-normalize by the average volume |
---|
1641 | zp1 = zz + 1.0; |
---|
1642 | zp2 = zz + 2.0; |
---|
1643 | zp3 = zz + 3.0; |
---|
1644 | vpoly = 4.0*pi/3.0*zp3*zp2/zp1/zp1*pow((rcore+thick),3); |
---|
1645 | answer /= vpoly; |
---|
1646 | //scale |
---|
1647 | answer *= scale; |
---|
1648 | // add in the background |
---|
1649 | answer += bkg; |
---|
1650 | |
---|
1651 | return(answer); |
---|
1652 | } |
---|
1653 | |
---|
1654 | double |
---|
1655 | PolyTwoShell(double dp[], double x) |
---|
1656 | { |
---|
1657 | double scale,rcore,rhocore,rhosolv,bkg,pd,zz; //my local names |
---|
1658 | double va,vb,summ,yyy,zi; |
---|
1659 | double answer,zp1,zp2,zp3,vpoly,range,temp_2sf[9],pi; |
---|
1660 | int nord=76,ii; |
---|
1661 | double thick1,thick2; |
---|
1662 | double rhoshel1,rhoshel2; |
---|
1663 | |
---|
1664 | scale = dp[0]; |
---|
1665 | rcore = dp[1]; |
---|
1666 | pd = dp[2]; |
---|
1667 | rhocore = dp[3]; |
---|
1668 | thick1 = dp[4]; |
---|
1669 | rhoshel1 = dp[5]; |
---|
1670 | thick2 = dp[6]; |
---|
1671 | rhoshel2 = dp[7]; |
---|
1672 | rhosolv = dp[8]; |
---|
1673 | bkg = dp[9]; |
---|
1674 | |
---|
1675 | pi = 4.0*atan(1.0); |
---|
1676 | |
---|
1677 | zz = (1.0/pd)*(1.0/pd)-1.0; //polydispersity of the core only |
---|
1678 | |
---|
1679 | range = 8.0; //std deviations for the integration |
---|
1680 | va = rcore*(1.0-range*pd); |
---|
1681 | if (va<0.0) { |
---|
1682 | va=0.0; //otherwise numerical error when pd >= 0.3, making a<0 |
---|
1683 | } |
---|
1684 | if (pd>0.3) { |
---|
1685 | range = range + (pd-0.3)*18.0; //stretch upper range to account for skewed tail |
---|
1686 | } |
---|
1687 | vb = rcore*(1.0+range*pd); // is this far enough past avg radius? |
---|
1688 | |
---|
1689 | //temp set scale=1 and bkg=0 for quadrature calc |
---|
1690 | temp_2sf[0] = 1.0; |
---|
1691 | temp_2sf[1] = dp[1]; //the core radius will be changed in the loop |
---|
1692 | temp_2sf[2] = dp[3]; |
---|
1693 | temp_2sf[3] = dp[4]; |
---|
1694 | temp_2sf[4] = dp[5]; |
---|
1695 | temp_2sf[5] = dp[6]; |
---|
1696 | temp_2sf[6] = dp[7]; |
---|
1697 | temp_2sf[7] = dp[8]; |
---|
1698 | temp_2sf[8] = 0.0; |
---|
1699 | |
---|
1700 | summ = 0.0; // initialize integral |
---|
1701 | for(ii=0;ii<nord;ii+=1) { |
---|
1702 | // calculate Gauss points on integration interval (r-value for evaluation) |
---|
1703 | zi = ( Gauss76Z[ii]*(vb-va) + vb + va )/2.0; |
---|
1704 | temp_2sf[1] = zi; |
---|
1705 | yyy = Gauss76Wt[ii] * SchulzPoint(zi,rcore,zz) * TwoShell(temp_2sf,x); |
---|
1706 | //un-normalize by volume |
---|
1707 | yyy *= 4.0*pi/3.0*pow((zi+thick1+thick2),3); |
---|
1708 | summ += yyy; //add to the running total of the quadrature |
---|
1709 | } |
---|
1710 | // calculate value of integral to return |
---|
1711 | answer = (vb-va)/2.0*summ; |
---|
1712 | |
---|
1713 | //re-normalize by the average volume |
---|
1714 | zp1 = zz + 1.0; |
---|
1715 | zp2 = zz + 2.0; |
---|
1716 | zp3 = zz + 3.0; |
---|
1717 | vpoly = 4.0*pi/3.0*zp3*zp2/zp1/zp1*pow((rcore+thick1+thick2),3); |
---|
1718 | answer /= vpoly; |
---|
1719 | //scale |
---|
1720 | answer *= scale; |
---|
1721 | // add in the background |
---|
1722 | answer += bkg; |
---|
1723 | |
---|
1724 | return(answer); |
---|
1725 | } |
---|
1726 | |
---|
1727 | double |
---|
1728 | PolyThreeShell(double dp[], double x) |
---|
1729 | { |
---|
1730 | double scale,rcore,rhocore,rhosolv,bkg,pd,zz; //my local names |
---|
1731 | double va,vb,summ,yyy,zi; |
---|
1732 | double answer,zp1,zp2,zp3,vpoly,range,temp_3sf[11],pi; |
---|
1733 | int nord=76,ii; |
---|
1734 | double thick1,thick2,thick3; |
---|
1735 | double rhoshel1,rhoshel2,rhoshel3; |
---|
1736 | |
---|
1737 | scale = dp[0]; |
---|
1738 | rcore = dp[1]; |
---|
1739 | pd = dp[2]; |
---|
1740 | rhocore = dp[3]; |
---|
1741 | thick1 = dp[4]; |
---|
1742 | rhoshel1 = dp[5]; |
---|
1743 | thick2 = dp[6]; |
---|
1744 | rhoshel2 = dp[7]; |
---|
1745 | thick3 = dp[8]; |
---|
1746 | rhoshel3 = dp[9]; |
---|
1747 | rhosolv = dp[10]; |
---|
1748 | bkg = dp[11]; |
---|
1749 | |
---|
1750 | pi = 4.0*atan(1.0); |
---|
1751 | |
---|
1752 | zz = (1.0/pd)*(1.0/pd)-1.0; //polydispersity of the core only |
---|
1753 | |
---|
1754 | range = 8.0; //std deviations for the integration |
---|
1755 | va = rcore*(1.0-range*pd); |
---|
1756 | if (va<0) { |
---|
1757 | va=0; //otherwise numerical error when pd >= 0.3, making a<0 |
---|
1758 | } |
---|
1759 | if (pd>0.3) { |
---|
1760 | range = range + (pd-0.3)*18.0; //stretch upper range to account for skewed tail |
---|
1761 | } |
---|
1762 | vb = rcore*(1.0+range*pd); // is this far enough past avg radius? |
---|
1763 | |
---|
1764 | //temp set scale=1 and bkg=0 for quadrature calc |
---|
1765 | temp_3sf[0] = 1.0; |
---|
1766 | temp_3sf[1] = dp[1]; //the core radius will be changed in the loop |
---|
1767 | temp_3sf[2] = dp[3]; |
---|
1768 | temp_3sf[3] = dp[4]; |
---|
1769 | temp_3sf[4] = dp[5]; |
---|
1770 | temp_3sf[5] = dp[6]; |
---|
1771 | temp_3sf[6] = dp[7]; |
---|
1772 | temp_3sf[7] = dp[8]; |
---|
1773 | temp_3sf[8] = dp[9]; |
---|
1774 | temp_3sf[9] = dp[10]; |
---|
1775 | temp_3sf[10] = 0.0; |
---|
1776 | |
---|
1777 | summ = 0.0; // initialize integral |
---|
1778 | for(ii=0;ii<nord;ii+=1) { |
---|
1779 | // calculate Gauss points on integration interval (r-value for evaluation) |
---|
1780 | zi = ( Gauss76Z[ii]*(vb-va) + vb + va )/2.0; |
---|
1781 | temp_3sf[1] = zi; |
---|
1782 | yyy = Gauss76Wt[ii] * SchulzPoint(zi,rcore,zz) * ThreeShell(temp_3sf,x); |
---|
1783 | //un-normalize by volume |
---|
1784 | yyy *= 4.0*pi/3.0*pow((zi+thick1+thick2+thick3),3); |
---|
1785 | summ += yyy; //add to the running total of the quadrature |
---|
1786 | } |
---|
1787 | // calculate value of integral to return |
---|
1788 | answer = (vb-va)/2.0*summ; |
---|
1789 | |
---|
1790 | //re-normalize by the average volume |
---|
1791 | zp1 = zz + 1.0; |
---|
1792 | zp2 = zz + 2.0; |
---|
1793 | zp3 = zz + 3.0; |
---|
1794 | vpoly = 4.0*pi/3.0*zp3*zp2/zp1/zp1*pow((rcore+thick1+thick2+thick3),3); |
---|
1795 | answer /= vpoly; |
---|
1796 | //scale |
---|
1797 | answer *= scale; |
---|
1798 | // add in the background |
---|
1799 | answer += bkg; |
---|
1800 | |
---|
1801 | return(answer); |
---|
1802 | } |
---|
1803 | |
---|
1804 | double |
---|
1805 | PolyFourShell(double dp[], double x) |
---|
1806 | { |
---|
1807 | double scale,rcore,rhocore,rhosolv,bkg,pd,zz; //my local names |
---|
1808 | double va,vb,summ,yyy,zi; |
---|
1809 | double answer,zp1,zp2,zp3,vpoly,range,temp_4sf[13],pi; |
---|
1810 | int nord=76,ii; |
---|
1811 | double thick1,thick2,thick3,thick4; |
---|
1812 | double rhoshel1,rhoshel2,rhoshel3,rhoshel4; |
---|
1813 | |
---|
1814 | scale = dp[0]; |
---|
1815 | rcore = dp[1]; |
---|
1816 | pd = dp[2]; |
---|
1817 | rhocore = dp[3]; |
---|
1818 | thick1 = dp[4]; |
---|
1819 | rhoshel1 = dp[5]; |
---|
1820 | thick2 = dp[6]; |
---|
1821 | rhoshel2 = dp[7]; |
---|
1822 | thick3 = dp[8]; |
---|
1823 | rhoshel3 = dp[9]; |
---|
1824 | thick4 = dp[10]; |
---|
1825 | rhoshel4 = dp[11]; |
---|
1826 | rhosolv = dp[12]; |
---|
1827 | bkg = dp[13]; |
---|
1828 | |
---|
1829 | pi = 4.0*atan(1.0); |
---|
1830 | |
---|
1831 | zz = (1.0/pd)*(1.0/pd)-1.0; //polydispersity of the core only |
---|
1832 | |
---|
1833 | range = 8.0; //std deviations for the integration |
---|
1834 | va = rcore*(1.0-range*pd); |
---|
1835 | if (va<0) { |
---|
1836 | va=0; //otherwise numerical error when pd >= 0.3, making a<0 |
---|
1837 | } |
---|
1838 | if (pd>0.3) { |
---|
1839 | range = range + (pd-0.3)*18.0; //stretch upper range to account for skewed tail |
---|
1840 | } |
---|
1841 | vb = rcore*(1.0+range*pd); // is this far enough past avg radius? |
---|
1842 | |
---|
1843 | //temp set scale=1 and bkg=0 for quadrature calc |
---|
1844 | temp_4sf[0] = 1.0; |
---|
1845 | temp_4sf[1] = dp[1]; //the core radius will be changed in the loop |
---|
1846 | temp_4sf[2] = dp[3]; |
---|
1847 | temp_4sf[3] = dp[4]; |
---|
1848 | temp_4sf[4] = dp[5]; |
---|
1849 | temp_4sf[5] = dp[6]; |
---|
1850 | temp_4sf[6] = dp[7]; |
---|
1851 | temp_4sf[7] = dp[8]; |
---|
1852 | temp_4sf[8] = dp[9]; |
---|
1853 | temp_4sf[9] = dp[10]; |
---|
1854 | temp_4sf[10] = dp[11]; |
---|
1855 | temp_4sf[11] = dp[12]; |
---|
1856 | temp_4sf[12] = 0.0; |
---|
1857 | |
---|
1858 | summ = 0.0; // initialize integral |
---|
1859 | for(ii=0;ii<nord;ii+=1) { |
---|
1860 | // calculate Gauss points on integration interval (r-value for evaluation) |
---|
1861 | zi = ( Gauss76Z[ii]*(vb-va) + vb + va )/2.0; |
---|
1862 | temp_4sf[1] = zi; |
---|
1863 | yyy = Gauss76Wt[ii] * SchulzPoint(zi,rcore,zz) * FourShell(temp_4sf,x); |
---|
1864 | //un-normalize by volume |
---|
1865 | yyy *= 4.0*pi/3.0*pow((zi+thick1+thick2+thick3+thick4),3); |
---|
1866 | summ += yyy; //add to the running total of the quadrature |
---|
1867 | } |
---|
1868 | // calculate value of integral to return |
---|
1869 | answer = (vb-va)/2.0*summ; |
---|
1870 | |
---|
1871 | //re-normalize by the average volume |
---|
1872 | zp1 = zz + 1.0; |
---|
1873 | zp2 = zz + 2.0; |
---|
1874 | zp3 = zz + 3.0; |
---|
1875 | vpoly = 4.0*pi/3.0*zp3*zp2/zp1/zp1*pow((rcore+thick1+thick2+thick3+thick4),3); |
---|
1876 | answer /= vpoly; |
---|
1877 | //scale |
---|
1878 | answer *= scale; |
---|
1879 | // add in the background |
---|
1880 | answer += bkg; |
---|
1881 | |
---|
1882 | return(answer); |
---|
1883 | } |
---|
1884 | |
---|
1885 | |
---|
1886 | /* BCC_ParaCrystal : calculates the form factor of a Triaxial Ellipsoid at the given x-value p->x |
---|
1887 | |
---|
1888 | Uses 150 pt Gaussian quadrature for both integrals |
---|
1889 | |
---|
1890 | */ |
---|
1891 | double |
---|
1892 | BCC_ParaCrystal(double w[], double x) |
---|
1893 | { |
---|
1894 | int i,j; |
---|
1895 | double Pi; |
---|
1896 | double scale,Dnn,gg,Rad,contrast,background,latticeScale,sld,sldSolv; //local variables of coefficient wave |
---|
1897 | int nordi=150; //order of integration |
---|
1898 | int nordj=150; |
---|
1899 | double va,vb; //upper and lower integration limits |
---|
1900 | double summ,zi,yyy,answer; //running tally of integration |
---|
1901 | double summj,vaj,vbj,zij; //for the inner integration |
---|
1902 | |
---|
1903 | Pi = 4.0*atan(1.0); |
---|
1904 | va = 0.0; |
---|
1905 | vb = 2.0*Pi; //orintational average, outer integral |
---|
1906 | vaj = 0.0; |
---|
1907 | vbj = Pi; //endpoints of inner integral |
---|
1908 | |
---|
1909 | summ = 0.0; //initialize intergral |
---|
1910 | |
---|
1911 | scale = w[0]; |
---|
1912 | Dnn = w[1]; //Nearest neighbor distance A |
---|
1913 | gg = w[2]; //Paracrystal distortion factor |
---|
1914 | Rad = w[3]; //Sphere radius |
---|
1915 | sld = w[4]; |
---|
1916 | sldSolv = w[5]; |
---|
1917 | background = w[6]; |
---|
1918 | |
---|
1919 | contrast = sld - sldSolv; |
---|
1920 | |
---|
1921 | //Volume fraction calculated from lattice symmetry and sphere radius |
---|
1922 | latticeScale = 2.0*(4.0/3.0)*Pi*(Rad*Rad*Rad)/pow(Dnn/sqrt(3.0/4.0),3); |
---|
1923 | |
---|
1924 | for(i=0;i<nordi;i++) { |
---|
1925 | //setup inner integral over the ellipsoidal cross-section |
---|
1926 | summj=0.0; |
---|
1927 | zi = ( Gauss150Z[i]*(vb-va) + va + vb )/2.0; //the outer dummy is phi |
---|
1928 | for(j=0;j<nordj;j++) { |
---|
1929 | //20 gauss points for the inner integral |
---|
1930 | zij = ( Gauss150Z[j]*(vbj-vaj) + vaj + vbj )/2.0; //the inner dummy is theta |
---|
1931 | yyy = Gauss150Wt[j] * BCC_Integrand(w,x,zi,zij); |
---|
1932 | summj += yyy; |
---|
1933 | } |
---|
1934 | //now calculate the value of the inner integral |
---|
1935 | answer = (vbj-vaj)/2.0*summj; |
---|
1936 | |
---|
1937 | //now calculate outer integral |
---|
1938 | yyy = Gauss150Wt[i] * answer; |
---|
1939 | summ += yyy; |
---|
1940 | } //final scaling is done at the end of the function, after the NT_FP64 case |
---|
1941 | |
---|
1942 | answer = (vb-va)/2.0*summ; |
---|
1943 | // Multiply by contrast^2 |
---|
1944 | answer *= SphereForm_Paracrystal(Rad,contrast,x)*scale*latticeScale; |
---|
1945 | // add in the background |
---|
1946 | answer += background; |
---|
1947 | |
---|
1948 | return answer; |
---|
1949 | } |
---|
1950 | |
---|
1951 | // xx is phi (outer) |
---|
1952 | // yy is theta (inner) |
---|
1953 | double |
---|
1954 | BCC_Integrand(double w[], double qq, double xx, double yy) { |
---|
1955 | |
---|
1956 | double retVal,temp1,temp3,aa,Da,Dnn,gg,Pi; |
---|
1957 | |
---|
1958 | Dnn = w[1]; //Nearest neighbor distance A |
---|
1959 | gg = w[2]; //Paracrystal distortion factor |
---|
1960 | aa = Dnn; |
---|
1961 | Da = gg*aa; |
---|
1962 | |
---|
1963 | Pi = 4.0*atan(1.0); |
---|
1964 | temp1 = qq*qq*Da*Da; |
---|
1965 | temp3 = qq*aa; |
---|
1966 | |
---|
1967 | retVal = BCCeval(yy,xx,temp1,temp3); |
---|
1968 | retVal /=4.0*Pi; |
---|
1969 | |
---|
1970 | return(retVal); |
---|
1971 | } |
---|
1972 | |
---|
1973 | double |
---|
1974 | BCCeval(double Theta, double Phi, double temp1, double temp3) { |
---|
1975 | |
---|
1976 | double temp6,temp7,temp8,temp9,temp10; |
---|
1977 | double result; |
---|
1978 | |
---|
1979 | temp6 = sin(Theta); |
---|
1980 | temp7 = sin(Theta)*cos(Phi)+sin(Theta)*sin(Phi)+cos(Theta); |
---|
1981 | temp8 = -1.0*sin(Theta)*cos(Phi)-sin(Theta)*sin(Phi)+cos(Theta); |
---|
1982 | temp9 = -1.0*sin(Theta)*cos(Phi)+sin(Theta)*sin(Phi)-cos(Theta); |
---|
1983 | temp10 = exp((-1.0/8.0)*temp1*((temp7*temp7)+(temp8*temp8)+(temp9*temp9))); |
---|
1984 | result = pow(1.0-(temp10*temp10),3)*temp6/((1.0-2.0*temp10*cos(0.5*temp3*(temp7))+(temp10*temp10))*(1.0-2.0*temp10*cos(0.5*temp3*(temp8))+(temp10*temp10))*(1.0-2.0*temp10*cos(0.5*temp3*(temp9))+(temp10*temp10))); |
---|
1985 | |
---|
1986 | return (result); |
---|
1987 | } |
---|
1988 | |
---|
1989 | double |
---|
1990 | SphereForm_Paracrystal(double radius, double delrho, double x) { |
---|
1991 | |
---|
1992 | double bes,f,vol,f2,pi; |
---|
1993 | pi = 4.0*atan(1.0); |
---|
1994 | // |
---|
1995 | //handle q==0 separately |
---|
1996 | if(x==0) { |
---|
1997 | f = 4.0/3.0*pi*radius*radius*radius*delrho*delrho*1.0e8; |
---|
1998 | return(f); |
---|
1999 | } |
---|
2000 | |
---|
2001 | bes = 3.0*(sin(x*radius)-x*radius*cos(x*radius))/(x*x*x)/(radius*radius*radius); |
---|
2002 | vol = 4.0*pi/3.0*radius*radius*radius; |
---|
2003 | f = vol*bes*delrho ; // [=] ᅵ |
---|
2004 | // normalize to single particle volume, convert to 1/cm |
---|
2005 | f2 = f * f / vol * 1.0e8; // [=] 1/cm |
---|
2006 | |
---|
2007 | return (f2); |
---|
2008 | } |
---|
2009 | |
---|
2010 | /* FCC_ParaCrystal : calculates the form factor of a Triaxial Ellipsoid at the given x-value p->x |
---|
2011 | |
---|
2012 | Uses 150 pt Gaussian quadrature for both integrals |
---|
2013 | |
---|
2014 | */ |
---|
2015 | double |
---|
2016 | FCC_ParaCrystal(double w[], double x) |
---|
2017 | { |
---|
2018 | int i,j; |
---|
2019 | double Pi; |
---|
2020 | double scale,Dnn,gg,Rad,contrast,background,latticeScale,sld,sldSolv; //local variables of coefficient wave |
---|
2021 | int nordi=150; //order of integration |
---|
2022 | int nordj=150; |
---|
2023 | double va,vb; //upper and lower integration limits |
---|
2024 | double summ,zi,yyy,answer; //running tally of integration |
---|
2025 | double summj,vaj,vbj,zij; //for the inner integration |
---|
2026 | |
---|
2027 | Pi = 4.0*atan(1.0); |
---|
2028 | va = 0.0; |
---|
2029 | vb = 2.0*Pi; //orintational average, outer integral |
---|
2030 | vaj = 0.0; |
---|
2031 | vbj = Pi; //endpoints of inner integral |
---|
2032 | |
---|
2033 | summ = 0.0; //initialize intergral |
---|
2034 | |
---|
2035 | scale = w[0]; |
---|
2036 | Dnn = w[1]; //Nearest neighbor distance A |
---|
2037 | gg = w[2]; //Paracrystal distortion factor |
---|
2038 | Rad = w[3]; //Sphere radius |
---|
2039 | sld = w[4]; |
---|
2040 | sldSolv = w[5]; |
---|
2041 | background = w[6]; |
---|
2042 | |
---|
2043 | contrast = sld - sldSolv; |
---|
2044 | //Volume fraction calculated from lattice symmetry and sphere radius |
---|
2045 | latticeScale = 4.0*(4.0/3.0)*Pi*(Rad*Rad*Rad)/pow(Dnn*sqrt(2.0),3); |
---|
2046 | |
---|
2047 | for(i=0;i<nordi;i++) { |
---|
2048 | //setup inner integral over the ellipsoidal cross-section |
---|
2049 | summj=0.0; |
---|
2050 | zi = ( Gauss150Z[i]*(vb-va) + va + vb )/2.0; //the outer dummy is phi |
---|
2051 | for(j=0;j<nordj;j++) { |
---|
2052 | //20 gauss points for the inner integral |
---|
2053 | zij = ( Gauss150Z[j]*(vbj-vaj) + vaj + vbj )/2.0; //the inner dummy is theta |
---|
2054 | yyy = Gauss150Wt[j] * FCC_Integrand(w,x,zi,zij); |
---|
2055 | summj += yyy; |
---|
2056 | } |
---|
2057 | //now calculate the value of the inner integral |
---|
2058 | answer = (vbj-vaj)/2.0*summj; |
---|
2059 | |
---|
2060 | //now calculate outer integral |
---|
2061 | yyy = Gauss150Wt[i] * answer; |
---|
2062 | summ += yyy; |
---|
2063 | } //final scaling is done at the end of the function, after the NT_FP64 case |
---|
2064 | |
---|
2065 | answer = (vb-va)/2.0*summ; |
---|
2066 | // Multiply by contrast^2 |
---|
2067 | answer *= SphereForm_Paracrystal(Rad,contrast,x)*scale*latticeScale; |
---|
2068 | // add in the background |
---|
2069 | answer += background; |
---|
2070 | |
---|
2071 | return answer; |
---|
2072 | } |
---|
2073 | |
---|
2074 | |
---|
2075 | // xx is phi (outer) |
---|
2076 | // yy is theta (inner) |
---|
2077 | double |
---|
2078 | FCC_Integrand(double w[], double qq, double xx, double yy) { |
---|
2079 | |
---|
2080 | double retVal,temp1,temp3,aa,Da,Dnn,gg,Pi; |
---|
2081 | |
---|
2082 | Pi = 4.0*atan(1.0); |
---|
2083 | Dnn = w[1]; //Nearest neighbor distance A |
---|
2084 | gg = w[2]; //Paracrystal distortion factor |
---|
2085 | aa = Dnn; |
---|
2086 | Da = gg*aa; |
---|
2087 | |
---|
2088 | temp1 = qq*qq*Da*Da; |
---|
2089 | temp3 = qq*aa; |
---|
2090 | |
---|
2091 | retVal = FCCeval(yy,xx,temp1,temp3); |
---|
2092 | retVal /=4*Pi; |
---|
2093 | |
---|
2094 | return(retVal); |
---|
2095 | } |
---|
2096 | |
---|
2097 | double |
---|
2098 | FCCeval(double Theta, double Phi, double temp1, double temp3) { |
---|
2099 | |
---|
2100 | double temp6,temp7,temp8,temp9,temp10; |
---|
2101 | double result; |
---|
2102 | |
---|
2103 | temp6 = sin(Theta); |
---|
2104 | temp7 = sin(Theta)*sin(Phi)+cos(Theta); |
---|
2105 | temp8 = -1.0*sin(Theta)*cos(Phi)+cos(Theta); |
---|
2106 | temp9 = -1.0*sin(Theta)*cos(Phi)+sin(Theta)*sin(Phi); |
---|
2107 | temp10 = exp((-1.0/8.0)*temp1*((temp7*temp7)+(temp8*temp8)+(temp9*temp9))); |
---|
2108 | result = pow((1.0-(temp10*temp10)),3)*temp6/((1.0-2.0*temp10*cos(0.5*temp3*(temp7))+(temp10*temp10))*(1.0-2.0*temp10*cos(0.5*temp3*(temp8))+(temp10*temp10))*(1.0-2.0*temp10*cos(0.5*temp3*(temp9))+(temp10*temp10))); |
---|
2109 | |
---|
2110 | return (result); |
---|
2111 | } |
---|
2112 | |
---|
2113 | |
---|
2114 | /* SC_ParaCrystal : calculates the form factor of a Triaxial Ellipsoid at the given x-value p->x |
---|
2115 | |
---|
2116 | Uses 150 pt Gaussian quadrature for both integrals |
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2117 | |
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2118 | */ |
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2119 | double |
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2120 | SC_ParaCrystal(double w[], double x) |
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2121 | { |
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2122 | int i,j; |
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2123 | double Pi; |
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2124 | double scale,Dnn,gg,Rad,contrast,background,latticeScale,sld,sldSolv; //local variables of coefficient wave |
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2125 | int nordi=150; //order of integration |
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2126 | int nordj=150; |
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2127 | double va,vb; //upper and lower integration limits |
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2128 | double summ,zi,yyy,answer; //running tally of integration |
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2129 | double summj,vaj,vbj,zij; //for the inner integration |
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2130 | |
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2131 | Pi = 4.0*atan(1.0); |
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2132 | va = 0.0; |
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2133 | vb = Pi/2.0; //orintational average, outer integral |
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2134 | vaj = 0.0; |
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2135 | vbj = Pi/2.0; //endpoints of inner integral |
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2136 | |
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2137 | summ = 0.0; //initialize intergral |
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2138 | |
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2139 | scale = w[0]; |
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2140 | Dnn = w[1]; //Nearest neighbor distance A |
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2141 | gg = w[2]; //Paracrystal distortion factor |
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2142 | Rad = w[3]; //Sphere radius |
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2143 | sld = w[4]; |
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2144 | sldSolv = w[5]; |
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2145 | background = w[6]; |
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2146 | |
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2147 | contrast = sld - sldSolv; |
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2148 | //Volume fraction calculated from lattice symmetry and sphere radius |
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2149 | latticeScale = (4.0/3.0)*Pi*(Rad*Rad*Rad)/pow(Dnn,3); |
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2150 | |
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2151 | for(i=0;i<nordi;i++) { |
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2152 | //setup inner integral over the ellipsoidal cross-section |
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2153 | summj=0.0; |
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2154 | zi = ( Gauss150Z[i]*(vb-va) + va + vb )/2.0; //the outer dummy is phi |
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2155 | for(j=0;j<nordj;j++) { |
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2156 | //20 gauss points for the inner integral |
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2157 | zij = ( Gauss150Z[j]*(vbj-vaj) + vaj + vbj )/2.0; //the inner dummy is theta |
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2158 | yyy = Gauss150Wt[j] * SC_Integrand(w,x,zi,zij); |
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2159 | summj += yyy; |
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2160 | } |
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2161 | //now calculate the value of the inner integral |
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2162 | answer = (vbj-vaj)/2.0*summj; |
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2163 | |
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2164 | //now calculate outer integral |
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2165 | yyy = Gauss150Wt[i] * answer; |
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2166 | summ += yyy; |
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2167 | } //final scaling is done at the end of the function, after the NT_FP64 case |
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2168 | |
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2169 | answer = (vb-va)/2.0*summ; |
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2170 | // Multiply by contrast^2 |
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2171 | answer *= SphereForm_Paracrystal(Rad,contrast,x)*scale*latticeScale; |
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2172 | // add in the background |
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2173 | answer += background; |
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2174 | |
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2175 | return answer; |
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2176 | } |
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2177 | |
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2178 | // xx is phi (outer) |
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2179 | // yy is theta (inner) |
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2180 | double |
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2181 | SC_Integrand(double w[], double qq, double xx, double yy) { |
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2182 | |
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2183 | double retVal,temp1,temp2,temp3,temp4,temp5,aa,Da,Dnn,gg,Pi; |
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2184 | |
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2185 | Pi = 4.0*atan(1.0); |
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2186 | Dnn = w[1]; //Nearest neighbor distance A |
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2187 | gg = w[2]; //Paracrystal distortion factor |
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2188 | aa = Dnn; |
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2189 | Da = gg*aa; |
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2190 | |
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2191 | temp1 = qq*qq*Da*Da; |
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2192 | temp2 = pow( 1.0-exp(-1.0*temp1) ,3); |
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2193 | temp3 = qq*aa; |
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2194 | temp4 = 2.0*exp(-0.5*temp1); |
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2195 | temp5 = exp(-1.0*temp1); |
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2196 | |
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2197 | |
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2198 | retVal = temp2*SCeval(yy,xx,temp3,temp4,temp5); |
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2199 | retVal *= 2.0/Pi; |
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2200 | |
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2201 | return(retVal); |
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2202 | } |
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2203 | |
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2204 | double |
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2205 | SCeval(double Theta, double Phi, double temp3, double temp4, double temp5) { //Function to calculate integrand values for simple cubic structure |
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2206 | |
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2207 | double temp6,temp7,temp8,temp9; //Theta and phi dependent parts of the equation |
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2208 | double result; |
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2209 | |
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2210 | temp6 = sin(Theta); |
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2211 | temp7 = -1.0*temp3*sin(Theta)*cos(Phi); |
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2212 | temp8 = temp3*sin(Theta)*sin(Phi); |
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2213 | temp9 = temp3*cos(Theta); |
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2214 | result = temp6/((1.0-temp4*cos((temp7))+temp5)*(1.0-temp4*cos((temp8))+temp5)*(1.0-temp4*cos((temp9))+temp5)); |
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2215 | |
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2216 | return (result); |
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2217 | } |
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2218 | |
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2219 | // scattering from a uniform sphere with a Gaussian size distribution |
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2220 | // |
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2221 | double |
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2222 | FuzzySpheres(double dp[], double q) |
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2223 | { |
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2224 | double pi,x; |
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2225 | double scale,rad,pd,sig,rho,rhos,bkg,delrho,sig_surf,f2,bes,vol,f; //my local names |
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2226 | double va,vb,zi,yy,summ,inten; |
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2227 | int nord=20,ii; |
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2228 | |
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2229 | pi = 4.0*atan(1.0); |
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2230 | x= q; |
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2231 | |
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2232 | scale=dp[0]; |
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2233 | rad=dp[1]; |
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2234 | pd=dp[2]; |
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2235 | sig=pd*rad; |
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2236 | sig_surf = dp[3]; |
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2237 | rho=dp[4]; |
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2238 | rhos=dp[5]; |
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2239 | delrho=rho-rhos; |
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2240 | bkg=dp[6]; |
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2241 | |
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2242 | |
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2243 | va = -4.0*sig + rad; |
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2244 | if (va<0) { |
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2245 | va=0; //to avoid numerical error when va<0 (-ve q-value) |
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2246 | } |
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2247 | vb = 4.0*sig +rad; |
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2248 | |
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2249 | summ = 0.0; // initialize integral |
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2250 | for(ii=0;ii<nord;ii+=1) { |
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2251 | // calculate Gauss points on integration interval (r-value for evaluation) |
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2252 | zi = ( Gauss20Z[ii]*(vb-va) + vb + va )/2.0; |
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2253 | // calculate sphere scattering |
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2254 | // |
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2255 | //handle q==0 separately |
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2256 | if (x==0.0) { |
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2257 | f2 = 4.0/3.0*pi*zi*zi*zi*delrho*delrho*1.0e8; |
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2258 | f2 *= exp(-0.5*sig_surf*sig_surf*x*x); |
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2259 | f2 *= exp(-0.5*sig_surf*sig_surf*x*x); |
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2260 | } else { |
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2261 | bes = 3.0*(sin(x*zi)-x*zi*cos(x*zi))/(x*x*x)/(zi*zi*zi); |
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2262 | vol = 4.0*pi/3.0*zi*zi*zi; |
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2263 | f = vol*bes*delrho; // [=] A |
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2264 | f *= exp(-0.5*sig_surf*sig_surf*x*x); |
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2265 | // normalize to single particle volume, convert to 1/cm |
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2266 | f2 = f * f / vol * 1.0e8; // [=] 1/cm |
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2267 | } |
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2268 | |
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2269 | yy = Gauss20Wt[ii] * Gauss_distr(sig,rad,zi) * f2; |
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2270 | yy *= 4.0*pi/3.0*zi*zi*zi; //un-normalize by current sphere volume |
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2271 | |
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2272 | summ += yy; //add to the running total of the quadrature |
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2273 | |
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2274 | |
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2275 | } |
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2276 | // calculate value of integral to return |
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2277 | inten = (vb-va)/2.0*summ; |
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2278 | |
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2279 | //re-normalize by polydisperse sphere volume |
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2280 | inten /= (4.0*pi/3.0*rad*rad*rad)*(1.0+3.0*pd*pd); |
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2281 | |
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2282 | inten *= scale; |
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2283 | inten += bkg; |
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2284 | |
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2285 | return(inten); //scale, and add in the background |
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2286 | } |
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2287 | |
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2288 | |
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