波谱学杂志2016，Vol.33Issue(3)：458-467,10.DOI:10.11938/cjmr20160311
超极化气体氙-129的低场NMR测量
Measuring Polarization of Hyperpolarized Xenon-129 Gas with Low-Field NMR
摘要
Abstract
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.关键词
低场核磁共振/超极化气体氙-129/自旋交换光泵Key words
low filed NMR/hyperpolarized xenon-129 gas/spin exchange optical pumping分类
数理科学引用本文复制引用
赵修超,孙献平,袁亚平,石磊,叶朝辉,周欣..超极化气体氙-129的低场NMR测量[J].波谱学杂志,2016,33(3):458-467,10.基金项目
国家自然科学基金资助项目(81227902,11174327) （81227902,11174327）
