Dipolar anisotropy effects in the spin relaxation of adsorbed3He monolayers |
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| Authors: | W. J. Mullin D. J. Creswell B. Cowan |
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| Affiliation: | (1) Department of Physics and Astronomy, University of Massachusetts, Amherst, Massachusetts;(2) School of Mathematical and Physical Sciences, University of Sussex, Falmer, Brighton, England |
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| Abstract: | Nuclear magnetic relaxation times and their anisotropy with respect to field direction are computed for adsorbed monolayer and submonolayer
3
He films. We considerT
1
andT
2
for fluid and solid systems with motion via diffusion and tunneling, respectively, andT
2
for the rigid lattice system. Calculations for the fluid system are carried out via a modification of Torrey theory and for the solid system by the method of moments. The rigid lattice fourth moment is computed to check the Gaussian approximation for the line shape. The results provide explanations of and predictions for experiments on Vycor and Grafoil substrates. Possible complications implied by our results for experiments on liquid
3
He in the millidegree region are discussed.Work supported in part by the Science Research Council (D.J.C. and B.C.) and the National Science Foundation (W.J.M.) under Grant GH 34504A1. |
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