NMR study of low-pressure 129Xe gas

✍ Scribed by Zidong Liu; Mingxin Zhao; Changjun Wu; Liyun Li; Senlin Li; Xizhi Zeng; Wen Xiong

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 355 KB
• Volume: 194
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(92)86079-w

✦ Synopsis

The enhanced 129Xe gas ( 15 Torr) NMR signal has been observed on a Varian XL-200 NMR spectrometer with spin-exchange optical pumping. An amplification factor of the nuclear spin polarization of gaseous 129Xe is of the order 103 times the Boltzmann polarization at 60°C. The binary spin-exchange cross section for Cs-129Xe has been measured by observing the nuclear spin relaxation of J 29Xe in the presence of Cs vapor. The measured cross section is ( 1.7 + 0.2 ) × 10-2o cm~. The effect of diffusion of 129Xe atoms on NMR signals is also discussed.