core_shell_microgelscostrafo411magnetic_modelrelease_v0.94release_v0.95ticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
Last change
on this file since 50ec515 was
2c74c11,
checked in by Paul Kienzle <pkienzle@…>, 8 years ago
|
implicit Iqxy; fix divide by 0 for q=0
|
-
Property mode set to
100644
|
File size:
557 bytes
|
Line | |
---|
1 | double form_volume(void); |
---|
2 | |
---|
3 | double Iq(double q, double radius2, double arms); |
---|
4 | |
---|
5 | static double _mass_fractal_kernel(double q, double radius2, double arms) |
---|
6 | { |
---|
7 | |
---|
8 | double u_2 = radius2 * pow(q,2); |
---|
9 | double v = u_2 * arms / (3.0 * arms - 2.0); |
---|
10 | |
---|
11 | double term1 = v - 1.0 + exp(-v); |
---|
12 | double term2 = ((arms - 1.0)/2.0)* pow((1.0 - exp(-v)),2.0); |
---|
13 | |
---|
14 | return (2.0 * (term1 + term2)) / (arms * pow(v,2.0)); |
---|
15 | |
---|
16 | } |
---|
17 | |
---|
18 | double form_volume(void) |
---|
19 | { |
---|
20 | return 1.0; |
---|
21 | } |
---|
22 | |
---|
23 | double Iq(double q, double radius2, double arms) |
---|
24 | { |
---|
25 | return _mass_fractal_kernel(q, radius2, arms); |
---|
26 | } |
---|
Note: See
TracBrowser
for help on using the repository browser.