Optimization design for energy response of the mobile radioactive gas monitor

Xuemei ZHOU; Guimin LIU; Yongzhong CHEN

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

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Optimization design for energy response of the mobile radioactive gas monitor

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-19

- Optimization design for energy response of the mobile radioactive gas monitor
- NUCLEAR TECHNIQUES Vol. 41, Issue 3, Article number: 030401(2018)
- 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：
- 基金信息：
  
  Strategic Priority Research Program of Chinese Academy of Sciences
- DOI：10.11889/j.0253-3219.2018.hjs.41.030401
  CLC： TL812.1
- Received：25 October 2017，
  
  Revised：21 November 2017，
  
  Published：10 March 2018
- 稿件说明：
移动端阅览
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：

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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