The effect of bi- and trivalent cation impurities on the luminescence of CsI

The effect of states of bi- (Ca) and trivalent (Sb, Bi) impurities on the optical and scintillation characteristics of CsI crystals is studied. The variation of point defect states (quenching, deformation, impurity concentration, diffusional activation) changes the correlation between different components of luminescence. The analysis of the obtained results leads to a conclusion about the role of cation vacancy type defects for the localization of the exciton in CsI crystals.<
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