Li S H, Hsu P C
Department of Nuclear Engineering, National Tsing Hua University, Taiwan, Republic of China.
Health Phys. 1990 Jan;58(1):65-72. doi: 10.1097/00004032-199001000-00008.
The influence of Mn activation on CaSO4:Dy thermoluminescent (TL) phosphor has been observed to study the basic TL characteristics such as TL output, fading, sensitivity, and dose response. The experimental results indicate that the TL characteristics are strongly influenced by the concentration of Mn dopant in CaSO4:Dy, especially for the low temperature trapping peak of the glow curves. The TL properties of CaSO4:Dy:Mn phosphor with a concentration ratio of 1:4 of Dy to Mn include not only high sensitivity, negligible fading, and linear dose response as compared to the CaSO4:Dy phosphor, but also two well-separated peaks and relative peak heights. This suggests that it can be used for accidental dose and elapsed time evaluations as well as for a routine personnel dosimeter. It was also found that 350 degrees C to 400 degrees C for 30 min is the optimum temperature and time in annealing treatment for this phosphor.
为研究热释光（TL）输出、衰退、灵敏度和剂量响应等基本热释光特性，已观察到锰激活对硫酸钙：镝热释光磷光体的影响。实验结果表明，热释光特性受硫酸钙：镝中锰掺杂剂浓度的强烈影响，尤其是对于发光曲线的低温俘获峰。镝与锰浓度比为1:4的硫酸钙：镝：锰磷光体的热释光特性不仅与硫酸钙：镝磷光体相比具有高灵敏度、可忽略不计的衰退和线性剂量响应，而且还有两个分离良好的峰和相对峰高。这表明它可用于意外剂量和经过时间评估以及常规人员剂量计。还发现350℃至400℃持续30分钟是该磷光体退火处理的最佳温度和时间。
