摘要
设计了一种结构简单、噪声低、功耗小的溴化镧(LaBr_3:Ce)γ谱仪前端读出电子学电路。该电路包括电压灵敏前置放大电路、谱仪放大电路和供电电源3部分,电路的设计基于传统核电子学方法和较新的电子元器件,采用低噪声设计技术,在能谱测量中获得了较高的能量分辨率。文中首先介绍了电路的设计方案,包括各部分电路原理、功能和设计要点;然后开展了电路仿真和电路板设计;最后通过实验进行电路功能验证。实验表明:基于研制的前端读出电子学电路、溴化镧(LaBr_3:Ce)探测器及数字多道分析器组成的γ谱仪系统,对^(137)Cs 662 keV γ能峰的能量分辨率可达2.7%,谱仪系统性能稳定。
A front-end readout electronics circuit of LaBr 3：Ce γ spectrometer with simple structure, low noise and low power consumption is designed. Based on the traditional method of nuclear electronics , the circuit designed with new electronic components and low noise technology consists of voltage sensitive preamplifier circuit, spectroscopy amplifier circuit, and power supply. First, the design of the circuit including the principles, functions, and key design points of each part is introduced. Then, the circuit simulation and the circuit board fabrication are carried out. Finally, the circuit function is verified through experiments. The results show that the energy resolution of the LaBr 3：Ce γ spectrometer for 137 Cs 662 keV energy peak can reach 2.7%, and the system performance is stable.
作者
陈彦丽
谭新建
卢毅
宋朝晖
易义成
渠红光
CHEN Yan-li;TAN Xin-jian;LU Yi;SONG Zhao-hui;YI Yi-cheng;QU Hong-guang(Northwest Institute of Nuclear Technology,Xi＇an 710024,China;State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Xi＇an 710024,China)
出处
《现代应用物理》
2018年第3期79-83,共5页
Modern Applied Physics
基金
国家自然科学基金资助项目(11575146)
