Abstract
Experimental data of 3He pulse NMR in contact with aerogel (95%) in a nuclear Larmor frequency range of 5 to 20 MHz at T=1.5 K are reported. For the first time spin kinetics of 3He (adsorbed, gaseous and liquid) has been studied systematically at temperatures higher than degeneracy temperature of this quantum liquid. It has been shown, that in all cases the nuclear spin-lattice relaxation time T1 is linearly proportional to the Larmor frequency, while the spin-spin relaxation time T2 is frequency independent. The magnetic relaxation times T1 and T2 are linearly proportional to the ratio of the magnetization of whole spin system to magnetization of the adsorbed layer of 3He.
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