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Phys. Rev. Lett. 80, 2801–2804 (1998)

Polarization of 3He by Spin Exchange with Optically Pumped Rb and K Vapors

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A. Ben-Amar Baranga, S. Appelt, M. V. Romalis, C. J. Erickson, A. R. Young, G. D. Cates, and W. Happer
Joseph Henry Laboratory, Physics Department, Princeton University, Princeton, New Jersey 08544

Received 13 August 1997; published in the issue dated 30 March 1998

We report on extensive experimental measurements of the key rates that determine the efficiency for polarizing the nuclei of 3He by spin exchange with optically pumped Rb vapor. In agreement with recent theoretical predictions, we find a strong temperature dependence of the electron-spin loss rates due to 3HeRb collisions. We also find that the maximum possible efficiency for spin-exchange polarization of 3He by K is 10 times greater than for Rb.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.2801
DOI:
10.1103/PhysRevLett.80.2801
PACS:
32.80.Bx, 32.70.Jz, 32.80.Cy