基于数字化技术的芪晶体探测器脉冲形状甄别方法研究  

Study of Digital Pulse Shape Discrimination Methods in Stilbene Detectors

作　　者：黄林[1] 陈黎[1] 陈华[1] 张兴[1] 袁熙[1] 谢旭飞[1] 樊铁栓[1] 

机构地区：[1]北京大学物理学院核物理与核技术国家重点实验室,北京100871

出　　处：《核电子学与探测技术》2012年第9期993-998,共6页Nuclear Electronics & Detection Technology

基　　金：国家重点基础研究发展计划(2008CB717803;2009GB107001);国家科技支撑计划课题资助(2011BAI02B01)

摘　　要：建立了一套基于芪晶体探测器和示波器的数字化中子谱仪,数据获取和处理由基于Lab-VIEWTM发展的软件完成。用电荷积分法、过零时间法、上升时间法和脉冲梯度法实现了对镅铍中子源测量的n/γ甄别。实验比较发现,电荷积分法效果最好且易于实现,具有较好抗噪能力的过零时间法也显示了较好的n/γ甄别能力。A digital neutron spectroscopy based on a stilbene detector and a digital oscilloscope has been devel- oped. All acquisitions and data processing have been made using a software package developed in LabVIEWTM. Four different digital pulse shape discrimination algorithms, including the integrated charge, zero - crossing, pulse gradient analysis, integrated rise time methods, were implemented and compared to each other. It is shown that the integrated charge method exhibits better performance with simple algorithm, and the zero - cross- ing technique with strong anti - interference ability still works well.

关 键 词：脉冲形状甄别 芪晶体探测器 LabVIEWTM 数字化中子谱仪 

分 类 号：TL817.3[核科学技术—核技术及应用]