Type of Work
Article
Date
6-1-2000
Journal Title
Journal of Applied Crystallography
Journal ISSN
0021-8898
Journal Volume
33
Journal Issue
1
First Page
771
Last Page
774
DOI
10.1107/S0021889800099817
Abstract
A neutron spin filter based on transmission through nuclear-spin-polarized He-3 gas has been applied to polarization analysis of small angle neutron scattering (SANS). Such spin filters, which are based on the large spin dependence of the absorption of neutrons by He-3, make SANS polarization analysis possible because of their large angular acceptance. In the present experiment, a He-3-based analyzer was employed to separate nuclear scattering into its coherent and spin-incoherent components. Polarized He-3 analyzers were prepared by two different optical pumping methods and installed on the NG3 SANS instrument at the NIST Center for Neutron Research (NCNR). Measurements were taken on cellophane tape and silica gel, for which the scattering is almost completely incoherent and coherent, respectively, and on a combined sample. For the combined sample, separation of the coherent part from the incoherent part was successfully demonstrated using polarization analysis.
Citation Information
Gentile, T. R.; Jones, Gordon L.; Thompson, A. K.; Barker, J.; Glinka, C. J.; Hammouda, B.; and Lynn, J. W., "SANS polarization analysis with nuclear-spin-polarized He-3" (2000). Hamilton Digital Commons.
https://digitalcommons.hamilton.edu/articles/50
Hamilton Areas of Study
Physics
Notes
This document is the publisher's version of an article published in:
Journal of Applied Crystallography, vol. 33, 1 (2000): 771-774 (2000). doi: 10.1107/S0021889800099817.