移动式放射性气体监测仪能量响应的优化设计

周雪梅; 刘桂民; 陈永忠

doi:10.11889/j.0253-3219.2018.hjs.41.030401

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移动式放射性气体监测仪能量响应的优化设计

核电子学与仪器 | 更新时间：2021-05-19

- 移动式放射性气体监测仪能量响应的优化设计
- Optimization design for energy response of the mobile radioactive gas monitor
- 核技术 2018年41卷第3期文章编号：030401
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.中国科学院钍基熔盐核能系统研究中心上海 201800
- 作者简介：
  
  [ "周雪梅, 女, 1979年出生, 2013年于中国科学院上海应用物理研究所获博士学位, 副研究员, 研究领域为反应堆物理及参数测量", "ZHOU Xuemei, female, born in 1979, graduated from Shanghai Institute of Applied Physics, Chinese Academy of Sciences with a doctoral degree in 2013, associate researcher, focusing on reactor physics and parameter measurement" ]
- 基金信息：
  
  中国科学院战略性先导科技专项(XD02001003)
- DOI：10.11889/j.0253-3219.2018.hjs.41.030401
  中图分类号： TL812.1
- 收稿日期：2017-10-25，
  
  修回日期：2017-11-21，
  
  纸质出版日期：2018-03-10
- 稿件说明：
移动端阅览
周雪梅, 刘桂民, 陈永忠. 移动式放射性气体监测仪能量响应的优化设计[J]. 核技术, 2018,41(3):030401

Xuemei ZHOU, Guimin LIU, Yongzhong CHEN. Optimization design for energy response of the mobile radioactive gas monitor[J]. Nuclear techniques, 2018, 41(3): 030401
周雪梅, 刘桂民, 陈永忠. 移动式放射性气体监测仪能量响应的优化设计[J]. 核技术, 2018,41(3):030401 DOI： 10.11889/j.0253-3219.2018.hjs.41.030401.

Xuemei ZHOU, Guimin LIU, Yongzhong CHEN. Optimization design for energy response of the mobile radioactive gas monitor[J]. Nuclear techniques, 2018, 41(3): 030401 DOI： 10.11889/j.0253-3219.2018.hjs.41.030401.

摘要

移动式放射性惰性气体监测仪对不同能量的γ射线存在不同的能量响应，为了提高其测量γ射线的准确性，需要对该监测仪进行能量响应补偿。利用MCNP（Monte Carlo N Particle Transport Code）软件模拟监测仪中的NaI（Tl）晶体在不同铅孔模型下的能量响应，通过比较不同模型下的标准偏差，选出屏蔽铅孔的最佳尺寸。模拟得出补偿铅孔的半径为3.0 cm、厚度为0.5 cm时，该监测仪的能量响应得到较好补偿。

Abstract

Background

The mobile radioactive gas monitor responses differently to gamma rays at different energies.

Purpose

This study aims to accurately measure the dose of gamma radiation monitor by means of compensation for energy response.

Methods

Energy responses of NaI(Tl) crystals in the monitor in different lead-hole models were simulated using Monte Carlo N Particle Transport Code (MCNP) software. Various sizes of shielding lead hole were selected to compare the standard deviations of different models

and the optimum size of shielding lead hole was obtained.

Results & Conclusion

The simulation result shows that the energy response of monitor is best compensated when the radius of hole is 3.0 cm and thickness of shielding lead is 0.5 cm.

关键词

Keywords

references

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