用于γ辐射场测量的差分电离室的设计  

The Design of a Differential Ionization Chamber Used for γ Radiated Field

作　　者：孙光智[1] 刘单[1] 钟秋林[1] 廖武[1] 吴荣俊[1] 贾靖轩[1] 邹涛[1] 王东芹[1] 郭智荣[1] 

机构地区：[1]武汉第二船舶设计研究所,武汉430064

出　　处：《核电子学与探测技术》2013年第1期41-44,61,共5页Nuclear Electronics & Detection Technology

摘　　要：设计了一种用于测量γ辐射场的高气压差分电离室。采用双电离室、单输出的探头结构和添加铅屏蔽体相结合的方法,实现了强γ辐射场中特定方位γ辐射信号的差分测量技术。通过蒙特卡罗模拟和试验测试,在探头外包裹锡带的探测器获得了较好的能量响应线性。同时,还介绍了与差分电离室相配套的弱信号放大电路的设计。The design of a type of high pressured differential ionization chamber used forγ radiated field is presented. Using dual - chamber, single signal output and appending lead shield, γradiated signal emitted from a given direction in intense γ radiated field is measured by differential technology. According to Monte - Carlo simulation and experimental test, the detector with a layer of Sn has a good energy response. Additionally, the design of a weak signal amplifier circuit matching for the chamber is introduced.

关 键 词：差分 电离室 能量响应 信噪比 

分 类 号：O571[理学—粒子物理与原子核物理]