Abstract

An rf pulse sequence is described that measures the nuclear spin-lattice relaxation time in the presence of a large rotating rf field distant from resonance by 10 5-10 7 rad/sec. Assuming the weak collision approximation τ c ⪡ T 2, this relaxation time is interpreted to provide a direct measure of correlation times in the range 10 −5 to 10 −7 sec which are difficult to obtain by conventional techniques that measure T 1 or T 1 ϱ . The results of an illustrative study on solid SF 6 were in good agreement with the theory.

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