A rotating-frame nuclear-double-resonance experiment is reported in which the cross-relaxation rates between ⁷Li and ⁶Li in powdered lithium metal were measured. The theory developed by McArthur, Hahn, and Walstedt (MHW) is applied to these data and good agreement is obtained. We also apply this theory to other published experimental data (LiF by Lang and Moran and adamantane by Pines and Shattuck) and find good agreement. We conclude that the assumption of a Lorentzian correlation function, which forms the basis of the theory of MHW, is generally valid.
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Stokes et al. (1977) studied this question.
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