Double pulse waveform spectrum of EJ339A capture-gated neutron detector

CHANG Le; LIU Longxiang; WANG Hongwei; MA Chunwang; CAO Xiguang; ZHANG Guoqiang; LIU Yingdu

doi:10.11889/j.0253-3219.2015.hjs.38.050403

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Double pulse waveform spectrum of EJ339A capture-gated neutron detector

更新时间：2021-03-03

- Double pulse waveform spectrum of EJ339A capture-gated neutron detector
- NUCLEAR TECHNIQUES Vol. 38, Issue 5, Article number: 050403(2015)
- 作者机构：
  
  1. 河南师范大学物理与电子工程学院,新乡,453007
  2. 中国科学院上海应用物理研究所嘉定园区,上海,201800
  3. 中国科学院核辐射与核能技术重点实验室,上海,201800
  4. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2015.hjs.38.050403
  CLC：
- Published：08 May 2015
- 稿件说明：
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CHANG Le, LIU Longxiang, WANG Hongwei, et al. Double pulse waveform spectrum of EJ339A capture-gated neutron detector[J]. Nuclear techniques, 2015, 38(5): 050403
DOI：

CHANG Le, LIU Longxiang, WANG Hongwei, et al. Double pulse waveform spectrum of EJ339A capture-gated neutron detector[J]. Nuclear techniques, 2015, 38(5): 050403 DOI： 10.11889/j.0253-3219.2015.hjs.38.050403.

摘要

实验研究了俘获门控中子探测器EJ339A的双脉冲波形特性，利用波形采样器进行波形记录，分析双脉冲时间差和PSD (Pulse Shape Discrimination)脉冲形状甄别和脉冲幅度谱。实验测量了EJ339A探测器中子俘获时间约为0.44 μs，同经验公式计算结果一致。数据分析表明，EJ339A俘获门控中子探测器对中子及伽玛射线的PSD甄别能力要弱于EJ301常规液闪探测器；通过分析PSD谱开窗后的中子和伽玛能谱，发现EJ339A能够分析n-p反冲脉冲和中子俘获脉冲的关联特性及入射中子能量信息，EJ339A探测器的中子探测效率和双脉冲测量效率较低。

Abstract

Background: Capture-gated neutron detector has been doped by the higher thermal cross section elements

such as 6Li

10B or natGd

for a fast neutron incident detector signal with n-p recoil impulse and pulse neutron capture associated characteristics. Purpose: The aim is to study the double pulse waveform spectra and to analyze the n-p recoil impulse of the EJ339A capture-gated neutron detector. Methods: Through the analysis of energy spectra and the double pulse waveform spectra

the characteristics of EJ339A capture-gated detector are studied. Results: Capture-gated detector from the energy spectra and PSD spectra measurement is effective for neutron and gamma ray. The wave of digital technology could well analyze the n-p recoil impulse and give the τ value of the EJ339A in the experiment. Conclusion: EJ339A really has captured-gated detector characteristics

pulse neutron capture and n-p associated characteristics of recoil impulse. The capture time of EJ339A is 0.44 μs

which is consistent with the theoretical calculation results. Abstract

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