Mahajan O H, Joshi T R, Nambi K S, Joshi R V
Applied Physics Department, Faculty of Technology and Engineering, Maharaja Sayajirao, University of Baroda, India.
Health Phys. 1986 Jul;51(1):127-33. doi: 10.1097/00004032-198607000-00011.
A detailed examination is presented of the thermoluminescence (TL) characteristics of untreated and heat-treated pure and Ba-doped NaCl exposed to gamma radiation at room temperature. The NaCl:Ba (10(-2) molar fraction) phosphor quenched from 750 degrees C, designated as NaCl:Ba(T), is found to give a pronounced TL output with a well-defined glow peak around 220 degrees C (peak III) along with other peaks at lower temperatures. It is suggested that the TL centre associated with glow peak III is comprised of an impurity-vacancy dipole with a negative ion vacancy in its vicinity. The TL centres are presumed to be located in the dislocation region. The dosimetric properties of peak III after gamma irradiation have also been examined. It is observed that most of the basic requirements of an efficient TLD material are fulfilled by the phosphor.
本文详细研究了未处理和热处理的纯氯化钠以及掺钡氯化钠在室温下暴露于伽马辐射时的热释光（TL）特性。从750℃淬火的NaCl:Ba（摩尔分数为10(-2)）磷光体，标记为NaCl:Ba(T)，被发现具有明显的热释光输出，在220℃左右有一个定义明确的发光峰（峰III），以及在较低温度下的其他峰。有人认为，与发光峰III相关的热释光中心由一个杂质 - 空位偶极组成，其附近有一个负离子空位。热释光中心被推测位于位错区域。还研究了伽马辐照后峰III的剂量学特性。观察到该磷光体满足了高效热释光剂量计材料的大多数基本要求。
