对称零面积梯形成形法削减电荷收集时间效应  

Symmetric Zero-Area Trapezoidal Shaping Method Reduces the Effect of Charge Collection Time

作　　者：邓鹤龄 宫辉[1] DENG He-ling;GONG Hui(Department of Engineering Physics,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学工程物理系

出　　处：《核电子学与探测技术》2019年第4期457-462,共6页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(11475094)资助

摘　　要：讨论了电荷收集时间对梯形成形效果的影响,统计方法及削减电荷收集时间效应的方法。应用实际测得的梯形脉宽来反推电荷收集时间,所得结果与实际情况符合较好。对60Co放射源进行能谱测试,60Co的两个特征峰的能量分辨率分别为1.9 keV和2.0 keV,验证了幅度提取校正对提高系统能量分辨率的效果。The effect of charge collection time on the trapezoidal shaping effect,statistical methods and methods to reduce the time effect of charge collection are discussed.The relationship between charge collection time and trapezoidal shaping pulse width is found by theoretical derivation.The calculation formula of charge collection time and the method of amplitude extraction correction are given.The actual trapezoidal pulse width was used to reverse the charge collection time,and the results were found to be in good agreement with the actual situation.The energy spectrum of the 60Co source was tested.The energy resolutions of the two characteristic peaks of 60Co were 1.9 keV and 2.0 keV,respectively,which verified the effect of amplitude extraction correction on improving energy resolution.

关 键 词：高纯锗 数字多道分析器 电荷收集时间 能量分辨率 对称零面积梯形成形 

分 类 号：TL82[核科学技术—核技术及应用]