Abstract
The longitudinal nuclear magnetic relaxation time T1 and the diffusion coefficient D in a sample of SF6 liquified under pressure have been measured by spin—echo techniques. The closed sample contained approximately a critical density of SF6. The measurements were made at temperatures between the freezing temperature, 221°K, and 315°K, which is 3.5°K below the critical temperature. Misch metal was used as an oxygen getter in the preparation of the sample. The measured values of T1 are compared with values calculated on the assumption that the relaxation is due to spin—rotational interactions and to intra- and intermolecular dipole—dipole interactions. The calculated and measured values of (1/T1) agree fairly well if reasonable values of the spin—rotational interaction constants are assumed. The calculation indicates that the nuclear magnetic relaxation of liquid SF6 is produced mainly by spin—rotational interactions.
Published Version
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