Chinese Journal of Magnetic Resonance >
Measuring Polarization of Hyperpolarized Xenon-129 Gas with Low-Field NMR
Received date: 2015-10-22
Revised date: 2016-07-10
Online published: 2016-09-05
Polarization of hyperpolarized xenon-129 gas prepared by spin exchange optical pumping (SEOP) is affected by many operating parameters. In this study, we measured polarization of hyperpolarized xenon-129 gas on a low field (0.002 T) NMR system, and used the results of such measurements to optimize the operating parameters of SEOP. The optimal operating temperature was first determined. Then the optimal building time for isotopically enriched and naturally abundant xenon-129 gases was determined to be 15 min and 22 min, respectively. The pressure and composition of the gases in the optical pumping process were then optimized to minimize spectral shift, broadening and lineshape change of the rubidium atom absorption lines. Finally, the optimal laser wavelength was determined. In conclusion, measuring polarization of hyperpolarized xenon-129 gas with low-field NMR provides an experimental basis for optimizing operating parameters of SEOP.
ZHAO Xiu-chao , SUN Xian-ping , YUAN Ya-ping , SHI Lei , YE Chao-hui , ZHOU Xin . Measuring Polarization of Hyperpolarized Xenon-129 Gas with Low-Field NMR[J]. Chinese Journal of Magnetic Resonance, 2016 , 33(3) : 458 -467 . DOI: 10.11938/cjmr20160311
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