Experiment validation of the high stability of long-term transmitted gamma photon counting of a new CdZnTe semiconductor detector and its preliminary applications  

作　　者：Chao Wang Yantao Liu Xiaopan Jiang Xianchao Huang Xiaoming Wang Yu Xiang Yiding Han Long Wei Zhiming Zhang 

机构地区：[1]Beijing Engineering Research Center of Radiographic Techniques and Equipment,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China [3]Jinan Laboratory of Applied Nuclear Science,Jinan 250131,China

出　　处：《Radiation Detection Technology and Methods》2022年第3期317-322,共6页辐射探测技术与方法（英文）

基　　金：supported by the NationalNatural Science Foundation of China.(grant numbers:11975248,12175266).

摘　　要：Purpose To develop a detector system with high stability in counting the detection of transmitted gamma photons,which can be applied in the area of non-destructive testing.Method We used the cadmium zinc telluride(CZT)detector with single-polarity electrodes to substitute the traditional scintillator detector and front-end read-out electronics based on our self-designed low-noise charge-sensitive amplifier.Results and conclusion The energy resolution of 662 keV from 137Cs radioactive source was improved to 1.9%,and the relative standard deviation of different total counts of transmitted photons detected decreased to 0.05%when the counts were more than 5×107,which means the impact from the statisticalfluctuation of long-term gamma photons counting will not be a main obstacle to achieving high precision in the area of non-destructive testing.The preliminary experiment of inspecting the inner gaps in the metal rodsfilled with samples also proved to have good prospects for the CZT detector in non-destructive testing.

关 键 词：Non-destructive testing NDT CZT detector High energy resolution 

分 类 号：O57[理学—粒子物理与原子核物理]