The investigation of influence of iodine ions on a luminescence of Cd Br2 - Mn Cl2

Optical and luminescence properties of the crystal Cd Br2 - Mn Cl2, Cd I2 are investigated in the 85 - 295 K temperature interval. It is found that additional doping Cd Br2 - Mn Cl2 with iodine results in increasing photo- and thermoluminescence efficiencies due to 4 Tlg (4 G) → 6 Alg(6S) electron-phonon transitions in Mn2+ -centers under LGI-21 nitric laser excitation. The additional band at 495 nm attributed to radiative recombination of excitons localized on I- ions is observed in X-ray luminescence spectra of the crystal at 85 K. The nature of activation bands in excitation spectra and the mechanism of the thermally stimulated luminescence are discussed