基于DP310采集卡的数字化n-γ甄别  

Digital Pulse Shape Discrimination Using DP310 Waveform Digitizer

作　　者：袁永刚[1,2] 雷家荣[2] 白立新[1] 

机构地区：[1]四川大学物理科学与技术学院,四川成都610064 [2]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《原子能科学技术》2010年第6期735-739,共5页Atomic Energy Science and Technology

基　　金：中国工程物理研究院预研项目资助(20060206-2)

摘　　要：以DP310数据采集卡为基础,对液体闪烁探测器BC501A的输出信号进行了数字化n-γ甄别研究。分别采集了探测器阳极以及经放大器ORTEC460的信号,采用电荷比较法和上升时间法对探测器的n-γ甄别能力进行了研究。研究结果表明:采用上升时间甄别方法时,采样频率越高,甄别能力越强,当上升时间的选取区间为脉冲幅度的10%～80%时,其甄别能力最强;采用电荷比较法时,当快成分积分时间为25ns时,n-γ脉冲甄别能力最强,其M因子为1.56。The digital pulse processing technique for n-γ discrimination was investigated using DP310 waveform digitizers in liquid scintillator detector.The signals from anode and delay line amplifier were acquired separately,and the two methods of n-γ discrimination were studied.The results show that for pulse rise time method,the higher sampling rate is,the higher the ability of n-γ discrimination is;and the good digital pulse shape discrimination （DPSD） figure of merit appears when the upper and lower thresholds of pulse rise time is 10%-80% range of amplitude.For charge comparison method,the good DPSD figure of merit appears when the fast components charge is integrated at 25 ns point,the DPSD figure of merit is 1.56.

关 键 词：n-γ甄别 液体闪烁探测器 电荷比较法 

分 类 号：TL375[核科学技术—核技术及应用]