HIGH-FIELD NMR OF ADSORBED XENON POLARIZED BY LASER PUMPING

被引：249

作者：

RAFTERY, D ^{[1
]}

LONG, H ^{[1
]}

MEERSMANN, T ^{[1
]}

GRANDINETTI, PJ ^{[1
]}

REVEN, L ^{[1
]}

PINES, A ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.66.584

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Optical pumping has been used to enhance the pulsed NMR signal of Xe-129, allowing the detection of low-pressure xenon gas and of xenon adsorbed on powdered solids. We observe an increase in sensitivity of more than 2 orders of magnitude over conventional NMR, the current limitation being the laser power. Adsorbed xenon is observed at 298 K on graphitized carbon (10 m2/g) and on powdered benzanthracene (approximately 0.5 m2/g) below 170 K. The increased sensitivity of this technique allows the study of a large class of amorphous materials with surface areas below 10 m2/g including semiconductors, polymers, metal oxides, and catalysts.

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页码：584 / 587

页数：4

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