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Last change
on this file since 1b001a7 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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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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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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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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23 | /// variation in bilayer thickness |
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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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32 | |
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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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