中国锦屏地下实验室低本底锗伽马射线谱仪的特性
The characteristics of a low background germanium gamma ray spectrometer at China JinPing Underground Laboratory.
作者信息
Zeng Zhi, Mi Yuhao, Ma Hao, Cheng Jianping, Su Jian, Yue Qian
机构信息
Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
出版信息
Appl Radiat Isot. 2014 Sep;91:165-70. doi: 10.1016/j.apradiso.2014.05.022. Epub 2014 Jun 2.
A low background germanium gamma ray spectrometer, GeTHU, has been installed at China JinPing Underground Laboratory (CJPL). The integral background count rate of the spectrometer was 0.629 cpm between 40 and 2700 keV, the origins of which were studied by Monte Carlo simulation. Detection limits and efficiencies were calculated for selected gamma peaks. Some samples of rare event experiments were measured and (137)Cs contamination was found in boric acid. GeTHU will be mainly used to measure environmental samples and screen materials in dark matter and double beta decay experiments.
一台低本底锗伽马射线能谱仪GeTHU已安装在中国锦屏地下实验室（CJPL）。该能谱仪在40至2700 keV之间的积分本底计数率为0.629次/分钟，通过蒙特卡罗模拟研究了其本底来源。计算了选定伽马峰的探测限和效率。对一些稀有事件实验的样品进行了测量，发现硼酸中存在(137)Cs污染。GeTHU将主要用于测量环境样品以及筛选暗物质和双贝塔衰变实验中的材料。
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