, T.
, Babcock, E.
, Boag, S.
, , C.
, Chupp, T.
, Jones, G.
, Petukhov, A.
and Walker, T.
(2009),
Effects of high intensity neutron flux on in-situ spin-exchange optical pumping of He-3, Journal of Physics Conference Proceedings, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907869
(Accessed September 18, 2024)
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Effects of high intensity neutron flux on in-situ spin-exchange optical pumping of He-3
Published
Author(s)
, E Babcock, Stephen Boag, C. Becham, T E. Chupp, Gordon L. Jones, A K. Petukhov, T G. Walker
Abstract
Prior studies revealed neutron beam-induced alkali-metal spin relaxation in 3He cells polarized in-situ by spin-exchange optical pumping. These effects are minor for neutron beams of low to moderate intensity, but become important at the highest neutron flux levels available in the full spectrum beams of high flux neutron sources. It was found that the relaxation consisted of a fast and a slow component, but the origin of neither is understood. This work further explored the mechanisms of this effect by measuring the magnitude and time dependence of alkali-metal spin-relaxation rates as a function of N2 and 3He composition. The experiments were performed on a thermal neutron beam line at the Institut Laue-Langevin with a maximum neutron flux of 2.4x10^9 cm^-2 s^-1.Citation
Journal of Physics Conference Proceedings
Pub Type
Journals
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Keywords
beam-induced, He-3, neutron
Citation
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Created September 17, 2009, Updated February 19, 2017