y = sf_sticky_hard_spheres(p, x, [y]) : Sticky Hard Sphere structure factor [Baxter/Menon]
iFunc/sf_sticky_hard_spheres Sticky Hard Sphere structure factor
(for e.g. spheres in dielectric liquids)
The 'x' wave-vector/momentum axis is usually in nm-1 or Angs-1.
Typical values for parameters are R=50 Angs, rho=0.04, tau=0.15
The Sticky Hard Sphere model converges to the Hard Sphere model [PY] with
increasing tau (e.g. tau > 10).
The model returns the S(q) structure factor.
See: S.V.G. Menon, C. Manobar, and K. Srinivasa Rao. J. Chem. Phys., 95 (1991) 9186
Extracted from sasfit/sasfit_sq/sasfit_sq_StickyHardSphere.c
I. Bressler, et al, Journal of Applied Crystallography, 2015, 48 (5), 1587-1598
input: p: sticky hard sphere model parameters (double)
p = [ R=hard_sphere_radius rho=Volume_Fraction tau=stickiness ]
or 'guess'
x: wave-vector/momentum axis (double, e.g. nm-1 or Angs-1)
y: when values are given and p='guess', a guess of the parameters is performed (double)
output: y: model value
ex: y=sf_sticky_hard_spheres([10 0.2 0.15], 0:0.01:1); or plot(sf_sticky_hard_spheres,[10 0.2 0.15], 0:0.01:1)
Version: Aug. 22, 2017
See also iFunc, iFunc/fits, iFunc/plot
(c) E.Farhi, ILL. License: EUPL.