source: sasview/sansmodels/src/sans/models/c_extensions/lamellar.h @ 97603c0

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Last change on this file since 97603c0 was 27972c1d, checked in by Jae Cho <jhjcho@…>, 15 years ago

removed all non asc font in the units

  • Property mode set to 100644
File size: 1.5 KB
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[34c3020]1#if !defined(lamellar_h)
2#define lamellar_h
3/** Structure definition for lamellar parameters
4 * [PYTHONCLASS] = LamellarModel
[975ec8e]5 * [DISP_PARAMS] = bi_thick
[42f193a]6   [DESCRIPTION] = <text>[Dilute Lamellar Form Factor](from a lyotropic lamellar phase)
[975ec8e]7                I(q)= 2*pi*P(q)/(delta *q^(2)), where
8                P(q)=2*(contrast/q)^(2)*(1-cos(q*delta))^(2))
9                bi_thick = bilayer thickness
10                sld_bi = SLD of bilayer
11                sld_sol = SLD of solvent
12                background = Incoherent background
13                scale = scale factor
14
[42f193a]15 </text>
[975ec8e]16[FIXED]= <text>bi_thick.width</text>
[34c3020]17 **/
18typedef struct {
19    /// Scale factor
20    //  [DEFAULT]=scale=1.0
21    double scale;
22    /// delta bilayer thickness [A]
[975ec8e]23    //  [DEFAULT]=bi_thick=50.0 [A]
24    double bi_thick;
[27972c1d]25    /// SLD of bilayer [1/A^(2)]
26    //  [DEFAULT]=sld_bi=1.0e-6 [1/A^(2)]
[975ec8e]27    double sld_bi;
[27972c1d]28    /// SLD of solvent [1/A^(2)]
29    //  [DEFAULT]=sld_sol=6.3e-6 [1/A^(2)]
[975ec8e]30    double sld_sol;
[34c3020]31        /// Incoherent Background [1/cm] 0.00
32        //  [DEFAULT]=background=0.0 [1/cm]
33        double background;
[42f193a]34
[34c3020]35
36} LamellarParameters;
37
[c1c29b6]38/// kernel
39double lamellar_kernel(double dp[], double q);
[34c3020]40/// 1D scattering function
41double lamellar_analytical_1D(LamellarParameters *pars, double q);
42
43/// 2D scattering function
44double lamellar_analytical_2D(LamellarParameters *pars, double q, double phi);
45double lamellar_analytical_2DXY(LamellarParameters *pars, double qx, double qy);
46double lamellar_analytical_2D_scaled(LamellarParameters *pars, double q, double q_x, double q_y);
47
48#endif
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