Theory of Nuclear Spin Relaxation in Copper Acetate

Abstract

The nuclear spin relaxation rate of protons in copper acetate monohydrate is calculated. The rate is found to be proportional to c, the population of the upper triplet state of coupled copper ion pair, at lower temperatures. If only the inter-pair interaction between the nearest copper ions on adjacent pairs is taken into account, the rate becomes proportional to c⁄(1−c⁄3)^1⁄2. The agreement between theory and experiment is fairly satisfactory.