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Production of polarized ^3He gas by means of very low temperature and high magnetic field

正義 田中, 亨 猪股, 豊 高橋, 守 藤原, 優 輿曽井, 英輝 郡, 岳史 太田, 知治 森崎, 貴之 国松, Masayoshi Tanaka, INOMATA, Toru, Yutaka Takahashi, Mamoru FUJIWARA, M. Yosoi, H. Kohri, Takeshi OHTA, Chiharu MORISAKI, T. Kunimatsu

Published Nov 30, 2009• 0 citations
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Effects of high spin polarization in3He↑-4He mixtures

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Physica B Condensed Matter•Feb 1, 1994•0 citations
This article gives a theoretical study of the effects of weak magnetic field gradients on the spin relaxation of a dilute atomic gas. The theory is valid for low or moderate values of the field (the relevant correlation time of the gas is then the diffusion time across the container) as well as for high fields (the intercollision time then plays the most important role). Quantum effects due to particle indistinguishability are included. No consequences of the divergence of the atomic mean free path in a polarized gas at zero temperature are found, in contrast to the situation for viscosity and heat conductivity. On the other hand, substantial effects due to « identical spin rotation effects » are predicted.
Abstract Very dilute solutions of 3He in superfluid 4He behave as an almost ideal Fermi gas at millikelvin temperatures, which can be strongly polarized in high magnetic fields. This has enabled studies of their equilibrium, transport, and dynamical spin properties to be made over a wide range of temperatures, concentrations, and polarizations covering systems that are highly degenerate to those that are non-degenerate. This chapter discusses polarized Fermi gas, model theories, equilibrium theories, transport properties, and spin dynamics.