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Concentration dependence ofD,T 1, andT 2 for dilute solutions of3He in solid4He
Authors:J Schratter  A R Allen  M G Richards
Affiliation:(1) School of Mathematical and Physical Sciences, University of Sussex, Brighton, Sussex, England;(2) Present address: Okanagan College, Vernon, British Columbia, Canada;(3) Present address: Department of Natural Philosophy, University of Aberdeen, Aberdeen, Scotland
Abstract:Measurements of the spin diffusion coefficientD and NMR relaxation timesT 1 andT 2 are reported for dilute solutions of3He in solid4He at two molar volumes, 20.95 and 20.7 cm3. The weakly interacting impuriton model, for whichD –1 is proportional to impurity concentration, is observed only at fractional impurity concentrationx 3 below 3 × 10–4. Forx 3 around 10–3,T 1 andT 2 are controlled by the formation and breakup of3He2 molecules.
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