A new consecutive energy calibration method for X/γ detectors based on energy continuously tunable laser Compton scattering light source  

作　　者：Hang-Hua Xu Hai-Long Wu Gong-Tao Fan Jian-Hui Chen Dong Wang 

机构地区：[1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China [2]University of Chinese Academy of Sciences, Beijing 100049,China

出　　处：《Nuclear Science and Techniques》2017年第9期8-15,共8页核技术（英文）

基　　金：supported by the National Key Research and Development Program of China(No.2016YFA0401901);the National Natural Science Foundation of China(No.11405427)

摘　　要：In this paper, we present an energy calibration method based on steep Compton edges of the laser Compton scattered(LCS) photon energy spectra. It performs consecutive energy calibration in the neighborhood of certain energy, hence improves calibration precision in the energy region. It can also achieve direct calibration at high energy region(several MeV) where detectors can only be calibrated by extrapolation in conventional methods.These make it suitable for detectors that need wide-range energy calibration with high precision. The effects of systematic uncertainties on accuracy of this calibration method are studied by simulation, using the design parameters of a LCS device—SINAP Ⅲ. The results show that the SINAP Ⅲ device is able to perform energy calibration work over the energy region of 25–740 keV. The precision of calibration is better than 1.6% from 25 to 300 keV and is better than 0.5% from 300 to 740 keV.In this paper, we present an energy calibration method based on steep Compton edges of the laser Compton scattered （LCS） photon energy spectra. It per- forms consecutive energy calibration in the neighborhood of certain energy, hence improves calibration precision in the energy region. It can also achieve direct calibration at high energy region （several MeV） where detectors can only be calibrated by extrapolation in conventional methods. These make it suitable for detectors that need wide-range energy calibration with high precision. The effects of systematic uncertainties on accuracy of this calibration method are studied by simulation, using the design parameters of a LCS device--SINAP TTI. The results show that the STNAP III device is able to perform energy cali- bration work over the energy region of 25-740 keV. The precision of calibration is better than 1.6% from 25 to 300 keV and is better than 0.5% from 300 to 740 keV.

关 键 词：康普顿散射 连续能量 可调谐激光 Γ探测器 校准 光源 标定方法 标定精度 

分 类 号：TL816[核科学技术—核技术及应用]