Thermoluminescence, photoluminescence, photo-stimulated luminescence and optical studies on X-ray irradiated KBr:Ce~(3+) crystals

摘要

This paper reports thermoluminescence (TL) glow and emission, optical absorption and optically stimulated emission studies made on Ce~(3+) doped KBr single crystals irradiated at room temperature. Optical absorption and photoluminescence studies confirm the presence of cerium ions in the divalent state. A broad and intense blue emission around at 290 and 390 nm, attributable to the transition from 5d excited state to the 4f~1 ground state of Ce~(3+) ions could be observed in the photoluminescence emission. Two TL glow peaks were observed at 374 and 422 K. Presence of characteristic emission due to Ce~(3+) ions in the optically stimulated emission at the F-band confirms the participations of the Ce~(3+) ions in the defect production and recombination processes.