Nuclear Spin Relaxation in LiquidHe3II

The nuclear spin thermal relaxation time, $T_1$, of ${\mathrm{He}}^3$ nuclei in pure liquid ${\mathrm{He}}^3$ at its saturated vapor pressure has been measured at temperatures between 0.8°K and 3.1°K, at static magnetic fields from 1560 gauss to 12 200 gauss. No dependence of $T_1$ on the static magnetic field was observed. The measured relaxation times increase gradually from 300 seconds at 0.8°K to 650 seconds at 3.1°K. These measured relaxation times do not appear to have been significantly shortened by wall relaxation processes. These results, which do not agree with measurements made elsewhere, are in good agreement with the short correlation time form of the Bloembergen, Purcell, Pound theory of spin relaxation in liquids.