High-temperature thermoluminescence of anion-deficient corundum and its connection with intrinsic defects and impurities

5th International Congress on Energy Fluxes and Radiation Effects 2016

Abashev, R.N.^1,2 ; Surdo, A.I.^1,2 ; Milman, I.I.^1

Ural Federal University, 19 Mira Str., Ekaterinburg

620002, Russia^1

Institute of Industrial Ecology UB RAS, 20 S. Kovalevskaya Str., Ekaterinburg

620219, Russia^2

关键词: Data points;    Direct conversion;    High temperature;    Intrinsic defects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012149/pdf
DOI  :  10.1088/1742-6596/830/1/012149

来源: IOP

【 摘 要 】

Anion-deficient corundum and TLD-500 detectors on their basis were studied for a possible correlation between the thermoluminescence (TL) yield in the high-temperature TL peak at 830 K and the transformation of intrinsic defects and contents of impurities. Only 40- 60% of TLD-500 detectors were found to have 830 K TL peak. The efficiency of thermally stimulated direct conversion of F and F+centers in the 800-930 K region depends on the presence of TL peak at 830 K. Obtained data point to the quenching role of the Ti impurity in the formation of the 830 K TL peak. Also, these data provide indirect evidence of association of the 830 K TL peak with Cr3+ions.