Enhancement of surface NMR by laser-polarized noble gases

TitleEnhancement of surface NMR by laser-polarized noble gases
Publication TypeJournal Article
Year of Publication1997
AuthorsRoom T., Appelt S., Seydoux R., Hahn E.L, Pines A
JournalPhysical Review B
Volume55
Issue17
Pagination11604-11610
Date PublishedMay 1
ISBN Number0163-1829
Accession NumberWOS:A1997WY50400096
Keywordshe-3
Abstract

The transfer of spin polarization from laser-polarized helium and xenon to spins such as H-1 and C-13 On the surface of high-surface-area solids (Aerosil) is demonstrated over a temperature range from 4 to 200 K. The transfer mechanism is dipole-dipole cross relaxation between the spins of the adsorbed mobile noble gas and the surface spins (spin-polarization-induced nuclear Overhauser effect). The enhancement of surface proton magnetization by laser-polarized helium at 4 K and 10 K is between one and twofold. Using laser-polarized xenon, enhancement factors of up to 20 were obtained when compared to the Boltzmann polarization in a field of 4.2 T and at a temperature of 130 K.

URL<Go to ISI>://WOS:A1997WY50400096
DOI10.1103/Physrevb.55.11604
Short TitleEnhancement of surface NMR by laser-polarized noble gases
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