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Optical absorption spectra of the mixed crystals of KBr1-xIx:Tl+ crystals studied at room temperature are reported.The absorption spectra indicated the appearance of additional bands on the low energy side of the Characteristic A,B and C absorption bands of KBr:Tl+ single crystals with increasing iodine composition.Comparing with earlier reports,the additional bands were attributed to the complex Tl+centers in the mixed configuration surrounded by Br-and I-ions as nearest neighbors.The absorption spectra of gamma irradiated mixed crystals showed F band,which shifts towards low energy side with the composition of iodine ions in the mixed crystals.
Optical absorption spectra of the mixed crystals of KBr1-xIx: Tl + crystals studied at room temperature are reported. The absorption spectra shows the appearance of additional bands on the low energy side of the Characteristic A, B and C absorption bands of KBr: Tl + single crystals with increasing iodine composition. Comparing with earlier reports, the additional bands were attributed to the complex Tl + centers in the mixed configuration surrounded by Br-and I-ions as nearest neighbors. The absorption spectra of gamma-irradiated mixed crystals showed F band, which shifts towards low energy side with the composition of iodine ions in the mixed crystals.