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Last change
on this file since 0ed400d was
6319646,
checked in by Jae Cho <jhjcho@…>, 13 years ago
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new includes for scale fix for P*S
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-
Property mode set to
100644
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File size:
1.7 KB
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1 | #if !defined(surfacefractal_h) |
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2 | #define surfacefractal_h |
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3 | #include "parameters.hh" |
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4 | |
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5 | /** |
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6 | * Structure definition for parameters |
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7 | */ |
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8 | //[PYTHONCLASS] = SurfaceFractalModel |
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9 | //[DESCRIPTION] =<text> The scattering intensity I(x) = scale*P(x)*S(x) + background, where |
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10 | // scale = scale_factor * V * delta^(2) |
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11 | // p(x)= F(x*radius)^(2) |
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12 | // F(x) = 3*[sin(x)-x cos(x)]/x**3 |
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13 | // S(x) = [(gamma(5-Ds)*colength^(5-Ds)*[1+(x^2*colength^2)]^((Ds-5)/2) |
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14 | // * sin[(Ds-5)*arctan(x*colength)])/x] |
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15 | // where delta = sldParticle -sldSolv. |
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16 | // radius = Particle radius |
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17 | // surface_dim = Surface fractal dimension (Ds) |
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18 | // co_length = Cut-off length |
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19 | // background = background |
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20 | // Ref.:Mildner, Hall,J Phys D Appl Phys(1986), 19, 1535-1545 |
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21 | // Note I: This model is valid for 1<surface_dim<3 with limited q range. |
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22 | // Note II: This model is not in absolute scale. |
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23 | // </text> |
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24 | //[ORIENTATION_PARAMS]= <text> </text> |
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25 | |
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26 | class SurfaceFractalModel{ |
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27 | public: |
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28 | // Model parameters |
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29 | /// Scale factor |
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30 | // [DEFAULT]=scale= 1.0 |
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31 | Parameter scale; |
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32 | |
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33 | /// Radius [A] |
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34 | // [DEFAULT]=radius=10.0 [A] |
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35 | Parameter radius; |
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36 | |
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37 | /// Surface fractal dimension |
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38 | // [DEFAULT]=surface_dim=2.0 |
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39 | Parameter surface_dim; |
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40 | |
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41 | /// Cut-off Length [A] |
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42 | // [DEFAULT]=co_length=500.0 [A] |
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43 | Parameter co_length; |
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44 | |
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45 | /// Incoherent Background |
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46 | // [DEFAULT]=background=0.0 |
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47 | Parameter background; |
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48 | |
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49 | // Constructor |
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50 | SurfaceFractalModel(); |
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51 | |
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52 | // Operators to get I(Q) |
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53 | double operator()(double q); |
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54 | double operator()(double qx, double qy); |
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55 | double calculate_ER(); |
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56 | double calculate_VR(); |
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57 | double evaluate_rphi(double q, double phi); |
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58 | }; |
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59 | |
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60 | #endif |
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