Program for fitting of small-angle neutron scattering data
, Nuclear Physics Institute, Řež, Czech Republic
The program SASProFit has been developed to address problems specific to
double crystal SANS diffractometers.
It is based on indirect Fourier transformation method and multiple scattering theory in diffraction
(see references for details).
Particularly, the program permits to
The program offers basic set of particle types, either monodisperse or with free size distribution.
Optionally, hard-sphere structure factor in local monodisperse approximation can be applied.
- treat slit-smeared scattering cross-sections directly, without preliminary conversion to
- take multiple scattering in diffraction regime into account,
- fit simultaneously data taken at different Q-ranges or even different instruments,
including 2-dimensional SANS spectra measured in pin-hole geometry
- evaluate scattering from anisotropic systems.
Hardware requirements strongly depend on the amount of data to be fitted.
CPU frequency above 1 GHz and RAM 256 MB are recommended.
Operating system: Windows XP/7/10 and hopefully later.
Documentation to the program is under development. At present, a basic users' guide in HTML format is
available on-line or for download.
It is also included in the program distribution.
The program SASProFit is freeware. No registration is required. For more details, see the license statement.
The package SASProFit 5.05 contains additional tools for data reduction used at NPI:
|Conversion tool for 2D-SANS data from BerSANS format||SANSMask
|Reduction of 1D-SANS data measured at NPI: ||SANSCor
|Calculator of scattering form factors: ||FFDEMO
 J. Šaroun, "Evaluation of double-crystal SANS data influenced by multiple scattering",
J. Appl. Cryst (2000) 33, 824-828.
 J. Šaroun, SASProFit - program for USANS data evaluation,
IConUSAS conference, Oak Ridge, 9-10 July 2003. (available also in