Abstract
On-line measured radiation-induced absorption spectra and their kinetics are presented for the doped PbWO4, YAlO3:Ce and CsI crystals. In the doubly doped PbWO4:Mo,Y crystals the saturation level of the induced absorption increased with Mo concentration up to 2750ppm. With a higher concentration it again gradually decreased. Yttrium co-doping around 100ppm improved considerably the radiation hardness of Mo-doped PbWO4. Characteristic recovery time of these crystals was about 30min. Positive influence of Zr+4 co-doping on characteristics of a set of YAlO3:Ce samples resulted in decrease in the induced absorption intensity. The presence of very slow recovery processes was in good agreement with thermoluminescence characteristics above room temperature reported earlier. An absorption band round 420nm appeared in as-grown CsI crystals doped with Tl, and was related to the oxygen contamination.
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