source: sasview/src/sas/models/include/StickyHS.h @ 79492222

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Last change on this file since 79492222 was 79492222, checked in by krzywon, 8 years ago

Changed the file and folder names to remove all SANS references.

  • Property mode set to 100644
File size: 1.6 KB
Line 
1#if !defined(StickyHS_h)
2#define StickyHS_h
3#include "parameters.hh"
4
5/**
6 * Structure definition for StickyHS_struct (struncture factor) parameters
7 */
8//[PYTHONCLASS] = StickyHSStructure
9//[DISP_PARAMS] = effect_radius
10//[DESCRIPTION] =<text> Structure Factor for interacting particles:                               .
11//
12//  The interaction potential is
13//
14//                     U(r)= inf , r < 2R
15//                         = -Uo  , 2R < r < 2R + w
16//                         = 0   , r >= 2R +w
17//
18//                                              R: effective radius of the hardsphere
19//                     stickiness = [exp(Uo/kT)]/(12*perturb)
20//                     perturb = w/(w+ 2R) , 0.01 =< w <= 0.1
21//                     w: The width of the square well ,w > 0
22//                                              v: The volume fraction , v > 0
23//
24//                     Ref: Menon, S. V. G.,et.al., J. Chem.
25//                      Phys., 1991, 95(12), 9186-9190.
26//                              </text>
27//[FIXED]= effect_radius.width
28
29class StickyHSStructure{
30public:
31  // Model parameters
32  /// effect radius of hardsphere [A]
33  //  [DEFAULT]=effect_radius=50.0 [A]
34  Parameter effect_radius;
35
36  /// Volume fraction
37  //  [DEFAULT]=volfraction= 0.1
38  Parameter volfraction;
39
40  /// Perturbation Parameter ( between 0.01 - 0.1)
41  //  [DEFAULT]=perturb=0.05
42  Parameter perturb;
43
44  /// Stickiness
45  //  [DEFAULT]=stickiness= 0.2
46  Parameter stickiness;
47
48  // Constructor
49  StickyHSStructure();
50
51  // Operators to get I(Q)
52  double operator()(double q);
53  double operator()(double qx, double qy);
54  double calculate_ER();
55  double calculate_VR();
56  double evaluate_rphi(double q, double phi);
57};
58
59#endif
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