γ能谱-剂量转换法测量环境辐射剂量  

Study on Reference Measurement Method of Dose of Environmental Radiation Based on G-function

作　　者：黄建微[1] 李德红[1] 张健[1] 吴金杰[1] 党永乐 吴笛[1,3] 

机构地区：[1]中国计量科学研究院,北京100013 [2]北京师范大学核科学与技术学院,北京100875 [3]南华大学,湖南衡阳421000

出　　处：《核电子学与探测技术》2017年第5期468-473,共6页Nuclear Electronics & Detection Technology

基　　金：中国计量科学研究院基本科研业务费(25-AKY1623-16)资助

摘　　要：采用HPGe谱仪测量γ射线能谱,通过一系列的方法实现对剂量率的精确测量。选择多个标准点源对一台HPGeγ谱仪进行能量与效率刻度,并求解得到G函数的具体形式,并在^(137)Csγ标准剂量辐射场中进行刻度与测量。实验结果表明:采用该方法在实际环境中的测量结果与剂量率仪的测试结果的最大误差为±14%。利用环境能谱测量得到环境辐射剂量是一种可行有效的方法。A HPGe spectrometer was used to measure the gamma ray spectrum, and a series of operations were taken to measure the dose - rate accurately. A number of standard point sources were selected to make the energy and efficiency calibration of this HPGe gamma spectrometer, and the specific form of the G - function was obtained. Then the dose - rate calibration and measurement were performed in the Cs -137 gamma standard dose radiation field. The experimental results show that the maximum error between the measured values and that via a dose - rate meter is 14%. It shows that it＇ s a feasible and effective method to measure the environmental radiation dose - rate with a HPGe spectrometer.

关 键 词：HPGEΓ谱仪 ^137Csγ辐射场 环境辐射剂量 G函数 

分 类 号：TL817[核科学技术—核技术及应用]