Nuclear polarization through optical pumping of gaseous 3He below 1 K
- 1 January 1983
- journal article
- Published by EDP Sciences in Journal de Physique Lettres
- Vol. 44 (13) , 523-529
- https://doi.org/10.1051/jphyslet:019830044013052300
Abstract
We have extended to temperatures below 1 K the optical pumping technique for polarizing the nuclei pf ground state 3He atoms in the gas phase. A superfluid 4He film covering the surface of the pyrex cell protected the 3He atoms from the rapid depolarization processes that would be experienced in the presence of bare pyrex walls. Relatively long relaxation times of order 103 s were observed at temperatures down to 500 mK, the lowest temperature accessible with the present apparatusKeywords
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