source: sasmodels/explore/beta/HSS_SQ.m @ 1a7ddc9

core_shell_microgelsmagnetic_modelticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
Last change on this file since 1a7ddc9 was e262dd6, checked in by Paul Kienzle <pkienzle@…>, 6 years ago

futher cleanup; include Yun's hardsphere and sphere models from matlab

  • Property mode set to 100644
File size: 457 bytes
RevLine 
[e262dd6]1function Sq=HSS_SQ(volF,Q)
2%Sq=HSS_SQ(volF,Q), Q is a normalzied scattering wavevector by the diamter of the particle
3
4a1=-(1+2*volF)^2/(1-volF)^4;
5a2=6*volF*(1+0.5*volF)^2/(1-volF)^4;
6a3=volF*a1/2;
7%pi = 3.14159265358979;
8
9cq=4*pi*(a1./Q.^3 .* (sin(Q)-Q.*cos(Q)) + ...
10    a2./Q.^4 .* (2*Q.*sin(Q)- (Q.^2 - 2) .* cos(Q) - 2) + ...
11    a3./Q.^6 .* ((4*Q.^3 - 24 * Q) .* sin(Q) - (Q.^4 -12 * Q.^2 + 24) .* cos(Q) + 24) );
12
13Sq = 1 ./ (1 - cq * volF * 6 / pi);
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