Gradient-Elastic Tensor in Alkali Bromide Crystals

Abstract

The S₁₁ components of the gradient-elastic tensor at alkali and bromine nuclear sites in all alkali bromide crystals are determined by the method of nuclear magnetic resonance acoustic saturation. The obtained S₁₁ values are compared with the theory which takes account of the contribution from the overlap of ion cores in addition to that from the point charges. The overlap integrals are calculated over the first and second nearest neighbor ions. The agreement between the experimental and calculated results seems to be satisfactory.