Effects of Nitrogen Quenching Gas on Spin-Exchange Optical Pumping of He-3

Details Effects of Nitrogen Quenching Gas on Spin-Exchange Optical Pumping of He-3 Effects of Nitrogen Quenching Gas on Spin-Exchange Optical Pumping of He-3

2010-08-25

arxiv.org/abs/1008.4392v1

Physics

Atomic Physics

Scientific paper

We consider the degree of conservation of nuclear spin polarization in the process of optical pumping under typical spin-exchange optical pumping conditions. Previous analyses have assumed that negligible nuclear spin precession occurs in the brief periods of time the alkali-metal atoms are in the excited state after absorbing photons and before undergoing quenching collisions with nitrogen molecules. We include excited-state hyperfine interactions, electronic spin relaxation in collisions with He and N_2, spontaneous emission, quenching collisions, and a simplified treatment of radiation trapping.

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