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Last change
on this file since 42f193a was
42f193a,
checked in by Jae Cho <jhjcho@…>, 15 years ago
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some corrections on dips-parameters and adding 2D cal
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-
Property mode set to
100644
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File size:
1.4 KB
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Rev | Line | |
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[34c3020] | 1 | #if !defined(lamellar_h) |
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| 2 | #define lamellar_h |
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| 3 | /** Structure definition for lamellar parameters |
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| 4 | * [PYTHONCLASS] = LamellarModel |
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[42f193a] | 5 | [DESCRIPTION] = <text>[Dilute Lamellar Form Factor](from a lyotropic lamellar phase) |
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| 6 | I(q)= 2*pi*P(q)/(delta *q^(2)), where |
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| 7 | P(q)=2*(contrast/q)^(2)*(1-cos(q*delta) |
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| 8 | *e^(1/2*(q*sigma)^(2)). |
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| 9 | delta = bilayer thickness |
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| 10 | sigma = variation in bilayer thickness |
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| 11 | = delta*polydispersity |
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| 12 | contrast = SLD_solvent - SLD_bilayer |
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| 13 | Note: the polydispersity in delta is included. |
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| 14 | </text> |
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[34c3020] | 15 | **/ |
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| 16 | typedef struct { |
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| 17 | /// Scale factor |
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| 18 | // [DEFAULT]=scale=1.0 |
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| 19 | double scale; |
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| 20 | /// delta bilayer thickness [A] |
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| 21 | // [DEFAULT]=delta=50.0 [A] |
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| 22 | double delta; |
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[42f193a] | 23 | /// variation in bilayer thickness |
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[34c3020] | 24 | // [DEFAULT]=sigma=0.15 |
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| 25 | double sigma; |
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| 26 | /// Contrast [1/A²] |
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| 27 | // [DEFAULT]=contrast=5.3e-6 [1/A²] |
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| 28 | double contrast; |
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| 29 | /// Incoherent Background [1/cm] 0.00 |
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| 30 | // [DEFAULT]=background=0.0 [1/cm] |
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| 31 | double background; |
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[42f193a] | 32 | |
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[34c3020] | 33 | |
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| 34 | } LamellarParameters; |
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| 35 | |
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| 36 | |
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| 37 | |
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| 38 | /// 1D scattering function |
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| 39 | double lamellar_analytical_1D(LamellarParameters *pars, double q); |
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| 40 | |
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| 41 | /// 2D scattering function |
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| 42 | double lamellar_analytical_2D(LamellarParameters *pars, double q, double phi); |
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| 43 | double lamellar_analytical_2DXY(LamellarParameters *pars, double qx, double qy); |
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| 44 | double lamellar_analytical_2D_scaled(LamellarParameters *pars, double q, double q_x, double q_y); |
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| 45 | |
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| 46 | #endif |
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