Study on the method of air absorbed dose rate measurement by NaI(Tl) detector

WANG Xuejian; YU Guobing; GUO Jianyou; XU Feng; GU Xianbao; PANG Yang

doi:10.11889/j.1000-3436.2023-0026

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Study on the method of air absorbed dose rate measurement by NaI(Tl) detector

RADIATION INTERDISCIPLINARY RESEARCH | 更新时间：2023-10-27

- Study on the method of air absorbed dose rate measurement by NaI(Tl) detector
- Journal of Radiation Research and Radiation Processing Vol. 41, Issue 5, Pages: 50701(2023)
- 作者机构：
  
  1.安徽大学物理与光电工程学院合肥 230601
  2.安徽省辐射环境监督站合肥 230071
  3.哈尔滨工程大学核科学技术学院哈尔滨 150001
  4.黑龙江省原子能研究院哈尔滨 150081
- 作者简介：
  
  WANG Xuejian (male) was born in October 1998. Now he is a graduate student at Anhui University, focusing on radiation monitoring and protection
  GUO Jianyou, professor, doctoral supervisor, E-mail: Jianyou@ahu.edu.cn
  XU Feng, E-mail: xufengid@sina.com
- 基金信息：
  
  National Natural Science Foundation of China(11935001)
- DOI：10.11889/j.1000-3436.2023-0026
  CLC：
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WANG Xuejian, YU Guobing, GUO Jianyou, et al. Study on the method of air absorbed dose rate measurement by NaI(Tl) detector. [J]. Journal of Radiation Research and Radiation Processing 41(5):050701(2023)
DOI：

WANG Xuejian, YU Guobing, GUO Jianyou, et al. Study on the method of air absorbed dose rate measurement by NaI(Tl) detector. [J]. Journal of Radiation Research and Radiation Processing 41(5):050701(2023) DOI： 10.11889/j.1000-3436.2023-0026.

摘要

本文基于,Φ,7.5 cm×7.5 cm NaI（Tl）探测器，开展测量γ射线空气吸收剂量率方法的研究。使用蒙特卡罗方法对NaI（Tl）探测器进行仿真模拟，获取探测器50 keV~2.5 MeV能量范围的γ射线能谱图。利用,G,（,E,）函数对放射源空气吸收剂量率进行计算，求解,G,（,E,）函数时考虑,K,max,与优化因子,M,对其计算空气吸收剂量率产生的影响，对,G,（,E,）函数的求解进行优化以提高计算精度。经过优化的,G,（,E,）函数计算的空气吸收剂量率与理论标准值相对偏差,S,低于±1%。最后经过实验测量对比发现，,G,（,E,）函数空气吸收剂量率计算结果与剂量率仪测量结果相对偏差小于±10%，说明经过优化得到的NaI（Tl）探测器,G,（,E,）函数值可以用于空气吸收剂量率的测量应用。

Abstract

This study investigated a method of measuring the absorbed dose rate of γ-ray in air using a ,Φ,7.5 cm×7.5 cm NaI(Tl) detector. Simulation of the NaI(Tl) detector using the Monte Carlo method was performed to obtain the γ-ray energy spectrum of the detector in the energy range of 50 keV~2.5 MeV. The ,G,(,E,) function was used to calculate the air-absorbed dose rate of radioactive sources. When solving the ,G,(,E,) function, the influence of the ,K,max, and the optimization factor ,M, on its calculation of the air-absorbed dose rate was considered, and the solution of the ,G,(,E,) function was optimized to improve the calculation accuracy. The relative deviation ,S, of the air absorbed dose rate calculated by the optimized ,G,(,E,) function from the theoretical standard value was less than ±1%. Finally, after the comparison of experimental measurements, it was found that the relative deviation between the calculated air absorbed dose rate of the ,G,(,E,) function and the measured results of the dose rate meter was less than ±10%, indicating that the optimized ,G,(,E,) function value of the NaI(Tl) detector can be used for the application of air absorbed dose rate measurement.

关键词

NaI（Tl）探测器G（E）函数空气吸收剂量率

Keywords

NaI(Tl) detectorG(E) functionAir absorbed dose rate

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