source: sasview/sansmodels/src/sans/models/c_extensions/multishell.h @ 18695bf

#if !defined(multishell_h)
#define multishell_h

/**
 * Structure definition for sphere parameters

        [PYTHONCLASS] = MultiShellModel
        [DISP_PARAMS] = core_radius, s_thickness, w_thickness
        [DESCRIPTION] =<text> MultiShell (Sphere) Model (or Multilamellar Vesicles): Model parameters;
                                scale : scale factor
                                core_radius : Core radius of the multishell
                                s_thickness: shell thickness
                                w_thickness: water thickness
                                core_sld: core scattering length density
                                shell_sld: shell scattering length density
                                n_pairs:number of pairs of water/shell
                                background: incoherent background
               </text>
        [FIXED]=  core_radius.width; s_thickness.width; w_thickness.width
        [ORIENTATION_PARAMS]= <text> </text>
 */
typedef struct {
    /// Scale factor
    //  [DEFAULT]=scale= 1.0
    double scale;

    /// Core radius of the multishell [A]
    //  [DEFAULT]=core_radius=60.0 [A]
    double core_radius;

        ///     shell thickness [A]
    //  [DEFAULT]=s_thickness= 10.0 [A]
    double s_thickness;

    /// water thickness [A]
    //  [DEFAULT]=w_thickness= 10.0 [A]
    double w_thickness;

        ///     core scattering length density [1/A^(2)]
    //  [DEFAULT]=core_sld= 6.4e-6 [1/A^(2)]
    double core_sld;

    /// shell scattering length density [1/A^(2)]
    //  [DEFAULT]=shell_sld= 4.0e-7 [1/A^(2)]
    double shell_sld;

        ///     number of pairs of water and shell
    //  [DEFAULT]=n_pairs= 2
    double n_pairs;

        /// Incoherent Background [1/cm]
        //  [DEFAULT]=background=0 [1/cm]
        double background;

} MultiShellParameters;



/// 1D scattering function
double multishell_analytical_1D(MultiShellParameters *pars, double q);

/// 2D scattering function
double multishell_analytical_2D(MultiShellParameters *pars, double q, double phi);
double multishell_analytical_2DXY(MultiShellParameters *pars, double qx, double qy);

#endif