Thermoluminescence and optically stimulated luminescence disadvantages of α-Al2O3:C crystal grown by the temperature gradient technique

Recently, α-Al₂O₃:C crystal with highly sensitive thermoluminescence (TL) and optically stimulated luminescence (OSL) has been successfully grown by the temperature gradient technique. This paper investigates the heating rate dependence of TL sensitivity, light-induced fading of TL signals and thermal stability of OSL of α-Al₂O₃:C crystals. As the heating rate increases, the integral TL response decreases and the dosimetric glow peak shifts to higher temperatures in α-Al₂O₃:C crystals. Light-induced fading of TL increases with the irradiation dose, and TL response decreases as the exposure time increases, especially in the first 15 minutes. With the increasing intensity of the exposure light, the TL fading of α-Al₂O₃:C crystal increases sharply. The OSL response of as-grown α-Al₂O₃:C crystal is quite stable below 373 K and decreases sharply for higher temperatures.

Thermoluminescence and optically stimulated luminescence disadvantages of $\alpha$-Al2O3:C crystal grown by the temperature gradient technique

Recently, $\alpha $-Al$\alpha $-Al$\alpha $-Al$_{2}$O$_{3}$:C, thermoluminescence, optically stimulated luminescence, light-induced fadingProject supported by the National Natural Science Foundation of China (Grant Nos.~60607015 and 60878041) and the Innovation Funds from Shanghai Institute of Ceramics, CAS.7860K, 7630M3/4/2009 12:00:00 AMRecently, $\alpha $-Al$_{2}$O$_{3}$:C crystal with highly sensitive thermoluminescence (TL) and optically stimulated luminescence (OSL) has been successfully grown by the temperature gradient technique. This paper investigates the heating rate dependence of TL sensitivity, light-induced fading of TL signals and thermal stability of OSL of $\alpha $-Al$_{2}$O$_{3}$:C crystals. As the heating rate increases, the integral TL response decreases and the dosimetric glow peak shifts to higher temperatures in $\alpha $-Al$_{2}$O$_{3}$:C crystals. Light-induced fading of TL increases with the irradiation dose, and TL response decreases as the exposure time increases, especially in the first 15 minutes. With the increasing intensity of the exposure light, the TL fading of $\alpha $-Al$_{2}$O$_{3}$:C crystal increases sharply. The OSL response of as-grown $\alpha $-Al$_{2}$O$_{3}$:C crystal is quite stable below 373 K and decreases sharply for higher temperatures.