6533b7d9fe1ef96bd126ca93

RESEARCH PRODUCT

X‐irradiation induced photo‐ and thermostimulated luminescence of CsCdF 3 :Mn crystals

subject

description

Photo- and thermostimulated luminescence (PSL and TSL respectively) of previously X-irradiated CsCdF3 crystal doped with Mn were investigated. After X-irradiation of CsCdF3 crystal at 8 K PSL bands at about 300 nm and 550 nm appear. Several stimulation bands can be revealed for luminescence at 300 nm and 550 nm. The stimulation band at 340 nm is related to an F-type centre absorption band in accordance with the Mollwo-Ivey relation for halide crystals. Subsequent heating of the crystal after X-irradiation at 8 K shows TSL peaks in the temperature regions 8 K – 90 K and 200 K – 300 K. The spectral composition of the TSL involves both bands at 300 nm and 550 nm. Experiments performed allow us to suggest that the PSL band at 300 nm should be the result of electron recombination with self-trapped holes (STH), but the luminescence at 550 nm is related to Mn ions. The mechanisms of radiative recombinations as well as the thermal stability of both STH and Mn ions are discussed. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)