Exciton states in alkali halides are analysed on the basis of a “transfer” model. Numerical calculation is made for the exciton state in KCl. The Hartree-Fock solutions of the 4 s electron in a free potassium atom and of the 3 p electron in a free chlorine atom are used for the wave functions of the transferred electron and the hole, respectively. The result obtained for KCl is employed to discuss exciton structures in KBr and KI qualitatively. The qualitative behaviors of exciton structures obtained for alkali halide crystals with fcc structure are similar to the conjectures of Eby, Teegarden and Dutton based on the analysis of their experiments.
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Ôsaka et al. (1962) studied this question.
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