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

Recently, α-Al₂O₃:C crystal with highlysensitive thermoluminescence (TL) and optically stimulatedluminescence (OSL) has been successfully grown by the temperature gradienttechnique. This paper investigates the heating rate dependence of TLsensitivity, light-induced fading of TL signals and thermalstability of OSL of α-Al₂O₃:C crystals. As theheating rate increases, the integral TL response decreases and thedosimetric glow peak shifts to higher temperatures in α-Al₂O₃:C crystals. Light-induced fading of TL increaseswith the irradiation dose, and TL response decreases as the exposuretime increases, especially in the first 15 minutes. With theincreasing intensity of the exposure light, the TL fading of α-Al₂O₃:C crystal increases sharply. The OSL response ofas-grown α-Al₂O₃:C crystal is quite stable below373 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, opticallystimulated luminescence, light-induced fadingProject supported by the NationalNatural Science Foundation of China (Grant Nos.~60607015 and60878041) and the Innovation Funds from Shanghai Institute ofCeramics, CAS.7860K, 7630M3/4/2009 12:00:00 AMRecently, $alpha $-Al$_{2}$O$_{3}$:C crystal with highlysensitive thermoluminescence (TL) and optically stimulatedluminescence (OSL) has been successfully grown by the temperature gradienttechnique. This paper investigates the heating rate dependence of TLsensitivity, light-induced fading of TL signals and thermalstability of OSL of $alpha $-Al$_{2}$O$_{3}$:C crystals. As theheating rate increases, the integral TL response decreases and thedosimetric glow peak shifts to higher temperatures in $alpha$-Al$_{2}$O$_{3}$:C crystals. Light-induced fading of TL increaseswith the irradiation dose, and TL response decreases as the exposuretime increases, especially in the first 15 minutes. With theincreasing intensity of the exposure light, the TL fading of $alpha$-Al$_{2}$O$_{3}$:C crystal increases sharply. The OSL response ofas-grown $alpha $-Al$_{2}$O$_{3}$:C crystal is quite stable below373 K and decreases sharply for higher temperatures.