Abstract
A calculation by Look and Lowe of the dipolar relaxation in a spin system where each spin jumps randomly between two equilibrium positions is extended to include correlated motion. A two-proton system is used as an example and the predicted variation of the minimum of T1 with the angle between the interproton vector positions is shown graphically for various interproton distances. The extension to a multi-spin system is indicated and the procedure for calculating T1 in polycrystalline material is discussed.
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