The effect of atomic and molecular motions on the NMR free-induction decay (FID) and lineshape is investigated theoretically in the intermediate temperature range in which the NMR line is only partially narrowed. It is shown that the FID may be decomposed into the weighted sum of a rigid-lattice (background) contribution and an exponentially decaying part containing all the information on the diffusive or reorientational motions in the crystal in terms of the spin-spin relaxation time T2.
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Work supported by the U.S. Department of Energy.
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Wolf, D. New Method for the Determination of Diffusion Constants from Partially Narrowed NMR Lines. MRS Online Proceedings Library 3, 529 (1980). https://doi.org/10.1557/PROC-3-529