NUCLEAR SPIN RELAXATION IN SOLID He$sup 3$
The nuclear spin relaxation times were measured in solid He/sup 3/ such that they might yield additional information as to the macroscopic propenties which have been attributed to quantum effects. The measurements indicate: (1) In cases where the volume changes with alpha -- beta transition, there are large changes in the relaxation times. (2) In cases where the volume change approaches zero, there are no changes in the relaxation time across the boundary. if there are changes in the diffusion coefficients, there must be compensating changes in other relaxation mechanisms. (3) For temperatures above 1.37 K the alpha - phase behaves as an ordinary solid with a large diffusion coefficient. The relaxation is determined by an activated diffusion of atoms through the lattice. At temperatures somewhat below 1 deg K, the relaxation is much too fast to be explained by the classical diffusive motion of the Bloembergen Purcell, and Pound theory. (B.O. G.)
- Research Organization:
- Duke Univ., Durham, N.C.
- NSA Number:
- NSA-14-015322
- OSTI ID:
- 4139638
- Journal Information:
- Phys. Rev. Letters, Journal Name: Phys. Rev. Letters Vol. Vol: 4
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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