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Published August 1, 2005 | public
Journal Article Open

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


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.

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.


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