Abstract
Abstract The “cross-relaxation” method (also called “level-crossing resonance” or “avoided level-crossing”) is a powerful technique that can be used to provide detailed structural and site information on impurities in materials. In this paper, we report on the development of the cross-relaxation technique for Li + 8 at the β -detected nuclear magnetic resonance ( β -NMR) facility located in TRIUMF in Vancouver. The measurements were carried out on a 〈 1 1 0 〉 Cu single crystal where the relaxation rate of the Li 8 polarization was monitored as a function of the applied longitudinal magnetic field. The occurrence of cross-relaxation, at a particular magnetic field, between the Li 8 and the surrounding nuclei is evident as a resonant enhancement of the relaxation rate at the level crossing field. We discuss inferences about the site and structure of Li + 8 in Cu from this data.
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