Thermally stimulated transformations of luminescence centers in TLD-500 detectors and their correlation with TL properties

TLD-500 detectors based on anion-deficient corundum with the 830 K TL peak and without it have been studied comprehensively for thermoluminescence in an extended temperature range of 300-1000 K, changes in the concentrations of active centers and their photoluminescence as a function of the annealing temperature up to 1400 K along with corresponding thermostimulated changes in the TL spectra and TL yields in the main peak at 450 K, including in individual bands. Such a comprehensive approach has enabled us to not only relate the observed TL with thermally stimulated transformations of centers and their interactions, but also to understand more profoundly the nature of the thermally stimulated processes in both the main and high-temperature peaks at 450 and 830 K, respectively.