Obtaining polarized liquid helium 3 from optically oriented gas
نویسنده
چکیده
2014 Spin polarized liquid helium three can be obtained by liquefaction of a gas polarized by laser optical pumping. We show that this method can lead to nuclear polarizations exceeding 40 % in a liquid at about 400 mK and almost zero pressure. The relaxation time of the orientation is a few minutes, comparable to the relaxation time of weakly polarized bulk liquid. The NMR signals given by the liquid are strongly shifted in frequency ; this provides a precise and convenient way to measure the polarization and to follow the motion of the liquid inside the experimental cell. Tome 49 N° 1 JANVIER 1988 J. Phys. France 49 (1988) 1-6 JANVIER 1988, Classification Physics Abstracts 32.80B 67.50 LE JOURNAL DE PHYSIQUE
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