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Title:
Optical Pumping System Design for Large Production of Hyperpolarized 129Xe
Authors:
Ruset, I. C.; Ketel, S.; Hersman, F. W.
Affiliation:
AA(Department of Physics, University of New Hampshire, Durham, New Hampshire 03824, USA), AB(Department of Physics, University of New Hampshire, Durham, New Hampshire 03824, USA), AC(Department of Physics, University of New Hampshire, Durham, New Hampshire 03824, USA)
Publication:
Physical Review Letters, vol. 96, Issue 5, id. 053002 (PhRvL Homepage)
Publication Date:
02/2006
Origin:
APS
PACS Keywords:
Level crossing and optical pumping, Electric and magnetic moments polarizability
DOI:
10.1103/PhysRevLett.96.053002
Bibliographic Code:
2006PhRvL..96e3002R

Abstract

We present a design for a spin-exchange optical pumping system to produce large quantities of highly polarized Xe129. Low xenon concentrations in the flowing gas mixture allow the laser to maintain high Rb polarization. The large spin-exchange rate between Rb and Xe129 through the long-lived van der Waals molecules at low pressure, combined with a high flow rate, results in large production rates of hyperpolarized xenon. We report a maximum polarization of 64% achieved for a 0.3l/h Xe flow rate, and maximum magnetization output of 6l/h at 22% polarization. Our findings regarding the polarization dependence on temperature, nitrogen partial pressure, and gas mixture flow velocity are also reported.
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