The `SANS_Liposomes_Abs` Component

Solid dilute monodisperse spheres sample with transmitted beam for Small Angle Neutron Scattering.

Identification

Site:
Author: Wim Bouwman, Delft University of Technology
Origin: TUDelft
Date: Aug 2012

Description

Sample for Small Angle Neutron Scattering.
Modified from the Any Sample model.
Normalization of scattering is done in INITIALIZE.
Some elements of Sans_spheres have been re-used

Some remarks:
Scattering function should be a defined the same way in INITIALIZE and TRACE sections
There exist maybe better library functions for the integral.

Transmitted paths set to 50% of all paths to be optimised for SESANS. In this simulation method paths are
well distributed among transmission and scattering (equally in Q-space).

Sample components leave the units of flux for the probability
of the individual paths. That is more consitent than the
Sans_spheres routine. Furthermore one can simulate the
transmitted beam. This allows to determine the needed size of
the beam stop. Absorption is included to
these sample-components.

Example: SANS_Spheres_Abs(R=100, Phi=1e-3, Delta_rho=0.6, sigma_a = 50, qmax=0.03, xwidth=0.01, yheight=0.01, zthick=0.001)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
R	AA	Radius of scattering hard spheres	100
dR			0.0
Phi	1	Particle volume fraction	1e-3
Delta_rho	fm/AA^3	Excess scattering length density	0.6
sigma_a	m^-1	Absorption cross section density at 2200 m/s	0.50
qmax	AA-1	Maximum scattering vector (typically 10/R to observe the 3rd ring)	0.03
xwidth	m	horiz. dimension of sample, as a width	0.01
yheight	m	vert.. dimension of sample, as a height	0.01
zthick	m	thickness of sample	0.001
dbilayer			35

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

The SANS_Liposomes_Abs Component

Identification

Description

Input parameters

Links

The `SANS_Liposomes_Abs` Component