[504abee] | 1 | double form_volume(double length, double kuhn_length, double radius); |
---|
| 2 | double Iq(double q, double length, double kuhn_length, double radius, |
---|
| 3 | double axis_ratio, double sld, double solvent_sld); |
---|
| 4 | double Iqxy(double qx, double qy, double length, double kuhn_length, |
---|
| 5 | double radius, double axis_ratio, double sld, double solvent_sld); |
---|
| 6 | double flexible_cylinder_ex_kernel(double q, double length, double kuhn_length, |
---|
| 7 | double radius, double axis_ratio, double sld, |
---|
| 8 | double solvent_sld); |
---|
| 9 | double elliptical_crosssection(double q, double a, double b); |
---|
| 10 | |
---|
| 11 | double form_volume(double length, double kuhn_length, double radius) |
---|
| 12 | { |
---|
| 13 | return 1.0; |
---|
| 14 | } |
---|
| 15 | |
---|
| 16 | double |
---|
| 17 | elliptical_crosssection(double q, double a, double b) |
---|
| 18 | { |
---|
| 19 | double uplim,lolim,Pi,summ,arg,zi,yyy,answer; |
---|
| 20 | int i,nord=76; |
---|
| 21 | |
---|
| 22 | Pi = 4.0*atan(1.0); |
---|
| 23 | lolim=0.0; |
---|
| 24 | uplim=Pi/2.0; |
---|
| 25 | summ=0.0; |
---|
| 26 | |
---|
| 27 | for(i=0;i<nord;i++) { |
---|
| 28 | zi = ( Gauss76Z[i]*(uplim-lolim) + uplim + lolim )/2.0; |
---|
| 29 | arg = q*sqrt(a*a*sin(zi)*sin(zi)+b*b*cos(zi)*cos(zi)); |
---|
| 30 | yyy = pow((2.0 * J1(arg) / arg),2); |
---|
| 31 | yyy *= Gauss76Wt[i]; |
---|
| 32 | summ += yyy; |
---|
| 33 | } |
---|
| 34 | answer = (uplim-lolim)/2.0*summ; |
---|
| 35 | answer *= 2.0/Pi; |
---|
| 36 | return(answer); |
---|
| 37 | |
---|
| 38 | } |
---|
| 39 | |
---|
| 40 | double flexible_cylinder_ex_kernel(double q, |
---|
| 41 | double length, |
---|
| 42 | double kuhn_length, |
---|
| 43 | double radius, |
---|
| 44 | double axis_ratio, |
---|
| 45 | double sld, |
---|
| 46 | double solvent_sld) |
---|
| 47 | { |
---|
| 48 | |
---|
| 49 | double Pi,flex,crossSect, cont; |
---|
| 50 | |
---|
| 51 | Pi = 4.0*atan(1.0); |
---|
| 52 | cont = sld - solvent_sld; |
---|
| 53 | crossSect = elliptical_crosssection(q,radius,(radius*axis_ratio)); |
---|
| 54 | |
---|
| 55 | flex = Sk_WR(q,length,kuhn_length); |
---|
| 56 | flex *= crossSect; |
---|
| 57 | flex *= Pi*radius*radius*axis_ratio*axis_ratio*length; |
---|
| 58 | flex *= cont*cont; |
---|
| 59 | flex *= 1.0e-4; |
---|
| 60 | |
---|
| 61 | return flex; |
---|
| 62 | } |
---|
| 63 | |
---|
| 64 | double Iq(double q, |
---|
| 65 | double length, |
---|
| 66 | double kuhn_length, |
---|
| 67 | double radius, |
---|
| 68 | double axis_ratio, |
---|
| 69 | double sld, |
---|
| 70 | double solvent_sld) |
---|
| 71 | { |
---|
| 72 | |
---|
| 73 | double result = flexible_cylinder_ex_kernel(q, |
---|
| 74 | length, |
---|
| 75 | kuhn_length, |
---|
| 76 | radius, |
---|
| 77 | axis_ratio, |
---|
| 78 | sld, |
---|
| 79 | solvent_sld); |
---|
| 80 | |
---|
| 81 | return result; |
---|
| 82 | } |
---|
| 83 | |
---|
| 84 | double Iqxy(double qx, double qy, |
---|
| 85 | double length, |
---|
| 86 | double kuhn_length, |
---|
| 87 | double radius, |
---|
| 88 | double axis_ratio, |
---|
| 89 | double sld, |
---|
| 90 | double solvent_sld) |
---|
| 91 | { |
---|
| 92 | double q; |
---|
| 93 | q = sqrt(qx*qx+qy*qy); |
---|
| 94 | double result = flexible_cylinder_ex_kernel(q, |
---|
| 95 | length, |
---|
| 96 | kuhn_length, |
---|
| 97 | radius, |
---|
| 98 | axis_ratio, |
---|
| 99 | sld, |
---|
| 100 | solvent_sld); |
---|
| 101 | |
---|
| 102 | return result; |
---|
| 103 | } |
---|