core_shell_microgelsmagnetic_modelticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
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Last change
on this file since 71b751d was
71b751d,
checked in by Paul Kienzle <pkienzle@…>, 6 years ago
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update remaining form factors to use Fq interface
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-
Property mode set to
100644
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File size:
1.5 KB
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| 1 | /******************************************************************* |
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| 2 | |
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| 3 | core_shell_kernel |
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| 4 | |
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| 5 | Form factor used in core_shell and fractal_core_shell |
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| 6 | |
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| 7 | ********************************************************************/ |
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| 8 | static |
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| 9 | double core_shell_fq(double q, |
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| 10 | double radius, |
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| 11 | double thickness, |
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| 12 | double core_sld, |
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| 13 | double shell_sld, |
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| 14 | double solvent_sld) |
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| 15 | { |
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| 16 | // Core first, then add in shell |
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| 17 | const double core_qr = q * radius; |
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| 18 | const double core_contrast = core_sld - shell_sld; |
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| 19 | const double core_bes = sas_3j1x_x(core_qr); |
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| 20 | const double core_volume = M_4PI_3 * cube(radius); |
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| 21 | double f = core_volume * core_bes * core_contrast; |
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| 22 | |
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| 23 | // Now the shell |
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| 24 | const double shell_qr = q * (radius + thickness); |
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| 25 | const double shell_contrast = shell_sld - solvent_sld; |
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| 26 | const double shell_bes = sas_3j1x_x(shell_qr); |
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| 27 | const double shell_volume = M_4PI_3 * cube(radius + thickness); |
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| 28 | f += shell_volume * shell_bes * shell_contrast; |
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| 29 | return f; |
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| 30 | } |
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| 31 | |
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| 32 | // Deprecated function: use core_shell_fq instead. |
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| 33 | static |
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| 34 | double core_shell_kernel(double q, |
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| 35 | double radius, |
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| 36 | double thickness, |
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| 37 | double core_sld, |
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| 38 | double shell_sld, |
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| 39 | double solvent_sld) |
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| 40 | { |
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| 41 | const double fq = core_shell_fq(q, radius, thickness, core_sld, shell_sld, solvent_sld); |
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| 42 | return 1.0e-4 * fq*fq; |
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| 43 | } |
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