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Measurement of spin-exchange rate constants between 129Xe and alkali metals

Shao, Wenjin and Wang, Guodong and Hughes, Emlyn W. (2005) Measurement of spin-exchange rate constants between 129Xe and alkali metals. Physical Review A, 72 (2). Art. No. 022713. ISSN 1050-2947. doi:10.1103/PhysRevA.72.022713.

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By measuring the relaxation rates of the nuclear spin polarization of Xe-129 in the presence of alkali-metal vapor at different densities, we have extracted the spin-exchange rates between Xe-129 and the three alkali metals K, Rb, and Cs. By studying the alkali-metal-Xe-129 spin-exchange rates as functions of the cell number density from 0.2 to 0.7 amagat, the binary collision and van der Waals molecular terms are separated, and constants governing both mechanisms are determined. The results from our work can be used to optimize the parameter space for polarizing Xe-129, a promising agent for magnetic resonance imaging and other applications.

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Additional Information:©2005 The American Physical Society. Received 3 September 2004; revised 14 February 2005; published 17 August 2005. This work was supported by the National Science Foundation under Grant No. PHY-0244245.
Subject Keywords:xenon; potassium; rubidium; caesium; nuclear polarisation; magnetic resonance; spin-spin relaxation; optical pumping
Issue or Number:2
Record Number:CaltechAUTHORS:SHApra05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5343
Deposited By: Tony Diaz
Deposited On:12 Oct 2006
Last Modified:08 Nov 2021 20:24

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