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Polarization-dependent frequency shifts from Rb-3He collisions

Newbury, N. R. and Barton, A. S. and Bogorad, P. and Cates, G. D. and Gatzke, M. and Mabuchi, H. and Saam, B. (1993) Polarization-dependent frequency shifts from Rb-3He collisions. Physical Review A, 48 (1). pp. 558-568. ISSN 1050-2947.

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We present measurements of the frequency shift of the Rb electron-paramagnetic-resonance (EPR) line in the presence of nuclear-polarized 3He gas for the temperature range of 30 to 85 °C. The frequency shift is due to the Fermi-contact interaction between the Rb valence electron and the polarized 3He nucleus. Expressions for both the frequency shift and the spin-exchange cross section are derived in terms of the strength of this contact interaction. From these expressions and the measured frequency shift, we estimate the Rb-3He spin-exchange cross section. The Rb EPR frequency shift, which is 53 kHz for a 100% polarized 10-amagat 3He sample at 50 °C, can be used to determine the absolute polarization of nuclear polarized 3He targets. From these measurements, one can also predict the shift of the 3He NMR line due to a polarized Rb vapor.

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Additional Information:©1993 The American Physical Society. Received 3 August 1992. We gratefully acknowledge many helpful and encouraging discussions with Will Happer and Thad Walker. This research was supported by Air Force Office of Scientific Research Grants No. 88-0165 and No. F49620-92-5-0211.
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9488
Deposited By: Tony Diaz
Deposited On:26 Jan 2008
Last Modified:03 Oct 2019 00:00

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