Optical pumping system design for large production of hyperpolarized Xe-129
We present a design for a spin-exchange optical pumping system to produce large quantities of highly polarized Xe-129. Low xenon concentrations in the flowing gas mixture allow the laser to maintain high Rb polarization. The large spin-exchange rate between Rb and Xe-129 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 0.3 l/h Xe flow rate, and maximum magnetization output of 6 l/h at 22% polarization. Our findings regarding the polarization dependence on temperature, nitrogen partial pressure, and gas mixture flow velocity are also reported.
Physical Review Letters
AMERICAN PHYSICAL SOCIETY
Digital Object Identifier (DOI)
Ruset, I. C.; Ketel, S.; and Hersman, F. William, "Optical pumping system design for large production of hyperpolarized Xe-129" (2006). Physical Review Letters. 139.
© 2006 The American Physical Society