A measurement of the absolute neutron beam polarization produced by an optically-pumped 3He spin filter

Details A measurement of the absolute neutron beam polarization produced by an optically-pumped 3He spin filter A measurement of the absolute neutron beam polarization produced by an optically-pumped 3He spin filter

1999-08-25

arxiv.org/abs/physics/9908050v1

Physics

Instrumentation and Detectors

35 pages, 11 figures, LaTeX format, submitted to Phys. Rev. A (1999)

Scientific paper

The capability of performing accurate measurements of neutron beam polarization opens a number of exciting opportunities in fundamental neutron physics and in neutron scattering. At the LANSCE pulsed neutron source we have measured the neutron beam polarization with absolute accuracy of 0.3% in the neutron energy range from 40 meV to 10 eV using an optically-pumped polarized 3He spin filter and a relative transmission measurement technique. 3He was polarized using the Rb spin-exchange method. We describe the measurement technique, present our results, and discuss some of the systematic effects associated with the method.

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