Theoretical simulation and experimental research of the light output function of liquid scintillator EJ339A

Tingting WANG; Liang WANG; Zhaohong MO; Deshan ZHAO; Zhonghua XIONG

doi:10.11889/j.0253-3219.2016.hjs.39.050403

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Theoretical simulation and experimental research of the light output function of liquid scintillator EJ339A

更新时间：2021-05-25

- Theoretical simulation and experimental research of the light output function of liquid scintillator EJ339A
- NUCLEAR TECHNIQUES Vol. 39, Issue 5, Article number: 050403(2016)
- 作者机构：
  
  1.中国工程物理研究院材料研究所表面物理与化学重点实验室江油 621907;
  2.中国工程物理研究院材料研究所绵阳 621700
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.050403
  CLC： TL812+.2
- Received：15 October 2015，
  
  Accepted：2016-03-15，
  
  Published：25 January 2016
- 稿件说明：
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Tingting WANG, Liang WANG, Zhaohong MO, et al. Theoretical simulation and experimental research of the light output function of liquid scintillator EJ339A[J]. Nuclear techniques, 2016, 39(5): 050403
DOI：

Tingting WANG, Liang WANG, Zhaohong MO, et al. Theoretical simulation and experimental research of the light output function of liquid scintillator EJ339A[J]. Nuclear techniques, 2016, 39(5): 050403 DOI： 10.11889/j.0253-3219.2016.hjs.39.050403.

摘要

对液体闪烁探测器EJ339A中子与伽马辐射测量问题

采用理论模拟与实验分析方法

结合自主设计搭建的基于LabVIEW的数字化信号处理系统

分别完成

Na、

133

Ba、

137

Cs和

Co等4种不同能量的γ源等效电子能量测量与刻度。在此基础上

利用中子飞行时间测量原理

在不同时间窗下将锎(

252

Cf)源近似分化成若干个单能中子源

获得1.9-7.8MeV范围内中子在探测器中的光输出响应函数。结果表明

理论模拟与实验测量值在低能段比较吻合

而高能段存在约7.3%的误差。

Abstract

Background:

The light output function is an elementary aspect for neutron spectrometry measured by an organic scintillator to unfold the neutron spectrum from the pulse height distribution.

Purpose:

This paper aims to investigate the properties of a boron-loaded liquid scintillator EJ339A

using photon sources and neutrons from a

252

Cf source.

Methods:

The light output was defined using Compton electron spectra. Pulse shape discrimination(PSD) and time of flight(TOF) were used to distinguish neutron and γ-rays. Combining theoretical modeling and experimental research

four different gamma sources are applied to achieve equivalent calibration of electronic energy

namely

133

137

and

respectively. Accordingly

based on TOF method

252

a spontaneous fission neutron source

is treated as several quasi-monoenergetic neutron sources under different time-windows.

Results:

The electron light output scale was calibrated by the measured detector response. Neutrons deposit energy in the detector and give a light output function with the neutron energy in the range of 1.9-7.8MeV.

Conclusion:

It shows that experimental data of light output function are in good agreement with simulation result in the low energy section

while discrepancies arise in the high energy section.

关键词

Keywords

references

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