GM计数管辐射特性与能量补偿研究  

Study on Radiation Characteristics and Energy Compensation of GM Tube

作　　者：徐阳 高飞[1] 赵瑞[2] 倪宁[1] 黄少鹏 王菲菲 林敏[1] XU Yang;GAO Fei;ZHAO Rui;NI Ning;HUANG Shao-peng;WANG Fei-fei;LIN Min(Key Laboratory of Measurement and Calibration Technology,China Institute of Atomic Energy,Beijing 102413,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国原子能科学研究院计量与校准技术重点实验室,北京102413 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2022年第4期554-559,共6页Acta Metrologica Sinica

摘　　要：基于国防科技工业电离辐射一级计量站X、γ射线参考辐射场,对某厂家生产的j613r型GM计数管的坪曲线、线性曲线等辐射特性进行实验研究;结合中国计量科学研究院CT成像系统精确测定计数管内部结构尺寸,并对灵敏区进行能量补偿。结果表明:在10.62μSv/h~161.52 mSv/h范围内,计数管可用于剂量测定;采用厚度为0.81 mm的Pb补偿层开中央狭缝的方式时,灵敏区最佳补偿面积为88%~90%,补偿后,48~662 keV范围内相对于^(137)Cs偏差在±20%以内,可为个人剂量仪提供测量部件。Based on the X andγ-ray reference radiation field of the primary metering station of ionizing radiation of Defense Science&Technology Industry,the radiation characteristics of j613r type GM tube produced by a manufacturer were experimentally studied.Combined with the CT imaging system of the National Institute of Metrology,the internal structure size of the tube was accurately measured,and the energy compensation for the sensitive area was carried out.The results showed that the tube can be used for dose determination in the range of 10.62μSv/h~161.52 mSv/h.The optimal compensation area of sensitive region is 88%~90%with the central slit is opened,and 0.81 mm Pb compensation layer is applied.After compensation,the deviation of ^(137)Cs is within±20%in the range of 48~662 keV,which can provide measurement components for personal dosimeter.

关 键 词：计量学 GM计数管 辐射特性 坪曲线 能量补偿 

分 类 号：TB98[一般工业技术—计量学]