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 flexible_cylinder_ex_kernel(double q, double length, double kuhn_length, |
---|
5 | double radius, double axis_ratio, double sld, |
---|
6 | double solvent_sld); |
---|
7 | double elliptical_crosssection(double q, double a, double b); |
---|
8 | |
---|
9 | double form_volume(double length, double kuhn_length, double radius) |
---|
10 | { |
---|
11 | return 1.0; |
---|
12 | } |
---|
13 | |
---|
14 | double |
---|
15 | elliptical_crosssection(double q, double a, double b) |
---|
16 | { |
---|
17 | double summ=0.0; |
---|
18 | |
---|
19 | for(int i=0;i<N_POINTS_76;i++) { |
---|
20 | double zi = ( Gauss76Z[i] + 1.0 )*M_PI/4.0; |
---|
21 | double sn, cn; |
---|
22 | SINCOS(zi, sn, cn); |
---|
23 | double arg = q*sqrt(a*a*sn*sn+b*b*cn*cn); |
---|
24 | double yyy = pow((double)sas_J1c(arg),2); |
---|
25 | yyy *= Gauss76Wt[i]; |
---|
26 | summ += yyy; |
---|
27 | } |
---|
28 | |
---|
29 | summ /= 2.0; |
---|
30 | return(summ); |
---|
31 | |
---|
32 | } |
---|
33 | |
---|
34 | double flexible_cylinder_ex_kernel(double q, |
---|
35 | double length, |
---|
36 | double kuhn_length, |
---|
37 | double radius, |
---|
38 | double axis_ratio, |
---|
39 | double sld, |
---|
40 | double solvent_sld) |
---|
41 | { |
---|
42 | |
---|
43 | double flex,crossSect, cont; |
---|
44 | |
---|
45 | cont = sld - solvent_sld; |
---|
46 | crossSect = elliptical_crosssection(q,radius,(radius*axis_ratio)); |
---|
47 | |
---|
48 | flex = Sk_WR(q,length,kuhn_length); |
---|
49 | flex *= crossSect; |
---|
50 | flex *= M_PI*radius*radius*axis_ratio*axis_ratio*length; |
---|
51 | flex *= cont*cont; |
---|
52 | flex *= 1.0e-4; |
---|
53 | |
---|
54 | return flex; |
---|
55 | } |
---|
56 | |
---|
57 | double Iq(double q, |
---|
58 | double length, |
---|
59 | double kuhn_length, |
---|
60 | double radius, |
---|
61 | double axis_ratio, |
---|
62 | double sld, |
---|
63 | double solvent_sld) |
---|
64 | { |
---|
65 | |
---|
66 | double result = flexible_cylinder_ex_kernel(q, |
---|
67 | length, |
---|
68 | kuhn_length, |
---|
69 | radius, |
---|
70 | axis_ratio, |
---|
71 | sld, |
---|
72 | solvent_sld); |
---|
73 | |
---|
74 | return result; |
---|
75 | } |
---|
76 | |
---|