原子能科学技术2017，Vol.51Issue(8)：1471-1477,7.DOI:10.7538/yzk.2016.youxian.0702
便携式γ能谱仪闪烁探头改进设计及性能研究
Improved Design and Performance Research on Portable γ Spectrometry Scintillation Probe
摘要
Abstract
In order to fill the need of high-performance scintillation probe for the current portable γ spectrometry,the CsI(Tl)crystal coupled with avalanche photo diode was adopted to constitute a new scintillation detector instead of NaI(Tl)crystal coupled with photomultiplier,also a low-noise charge sensitive amplifier was designed to serve as a readout circuit for the detector.For researching the performance of the improved scintillation probe,the regularity of the energy resolution changing with the temperature and the bias voltage was tested respectively based on the unique variable principle and experiments with spectrum response of γ ray for various radiation sources.The results show that the scintillation probe has a excellent characteristic of spectrum response for 137Cs,226Ra,60Co and 152Eu sources when the temperature is 23 ℃ and the bias voltage is 370 V.Especially,the energy resolution is 4.98％,the SNR of the output signal is 21:1 and the rise time is 80 ns for 137Cs.Thus it can be seen that the improved scintillation probe,which has better energy resolution,smaller size and stronger performance of anti-mechanical and applicability,is significantly more excellent than the conventional one.关键词
γ能谱仪/闪烁探头/电荷灵敏放大器/雪崩光电二极管/能谱响应/能量分辨率Key words
γ spectrometry/scintillation probe/charge sensitive amplifier/avalanche photo diode/spectrum response/energy resolution分类
能源科技引用本文复制引用
李元东,葛良全,王彦瑜,张开琪,胡传皓,卢威骅,孙坤,黄锐..便携式γ能谱仪闪烁探头改进设计及性能研究[J].原子能科学技术,2017,51(8):1471-1477,7.基金项目
国家自然科学基金资助项目(41474159) （41474159）
四川省科技计划资助项目(2015JQO035) （2015JQO035）
地学核技术四川省重点实验室开放基金资助项目(gnzds2014006) （gnzds2014006）
