Abstract
AbstractPolarization is found of the long‐wave A‐luminescence bands in KI:Tl, KI:In, KBr:In crystals at 7 K. It is established that the dependence of the polarization degree on azimuth corresponds to oscillator emission along the crystal axis [111]. These bands are assumed to be due to “trigonal” Jahn‐Teller minima of the activator 3T1u excited states. It is established that the 400 nm band in KBr:T1 crystal represents emission from the trigonal minimum of the metastable 3A1u‐state of the activator. A doublet structure of the short‐wave A‐luminescence bands is found and investigated. The hypothesis is made that the structure is connected with the presence of two types of tetragonal Jahn‐Teller minima of the activator 3T1u excited states.
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