core_shell_microgelsmagnetic_modelticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
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Last change
on this file since ee60aa7 was
ee60aa7,
checked in by Paul Kienzle <pkienzle@…>, 6 years ago
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clean up effective radius functions; improve mono_gauss_coil accuracy; start moving VR into C
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-
Property mode set to
100644
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File size:
750 bytes
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| Line | |
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| 1 | static double form_volume(double radius, double fuzziness) |
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| 2 | { |
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| 3 | return M_4PI_3*cube(radius); |
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| 4 | } |
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| 5 | |
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| 6 | static double |
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| 7 | effective_radius(int mode, double radius, double fuzziness) |
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| 8 | { |
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| 9 | switch (mode) { |
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| 10 | case 1: // radius |
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| 11 | return radius; |
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| 12 | case 2: // radius + fuzziness |
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| 13 | return radius + fuzziness; |
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| 14 | } |
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| 15 | } |
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| 16 | |
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| 17 | static void Fq(double q, double *F1, double *F2, double sld, double sld_solvent, |
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| 18 | double radius, double fuzziness) |
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| 19 | { |
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| 20 | const double qr = q*radius; |
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| 21 | const double bes = sas_3j1x_x(qr); |
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| 22 | const double qf = exp(-0.5*square(q*fuzziness)); |
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| 23 | const double contrast = (sld - sld_solvent); |
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| 24 | const double form = contrast * form_volume(radius,fuzziness) * bes * qf; |
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| 25 | *F1 = 1.0e-2*form; |
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| 26 | *F2 = 1.0e-4*form*form; |
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| 27 | } |
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