On the UV Absorption of Heavy Metal Ions in Alkali Halide Crystals II. Interpretation of the Temperature Dependences of the UV Dipole Strength

Abstract

Abstract The different temperature dependences of the UV dipole strength of forbidden electronic Ag + , Cu + , and Tl + transitions in alkali halide crystals are interpreted by electron‐phonon interaction, anharmonicity of phonons, off‐centre effects, and thermal relaxations of the centres.