NaI(Tl)探测器测量空气吸收剂量率方法研究  

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

作　　者：王雪建 於国兵 郭建友[1] 许丰 顾先宝 庞杨 WANG Xuejian;YU Guobing;GUO Jianyou;XU Feng;GU Xianbao;PANG Yang(School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China;Radiation Environment Supervision Station,Anhui Provincial Department of Ecology and Environment,Hefei 230071,China;School of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Institute of Atomic Energy,Heilongjiang Province,Harbin 150081,China)

机构地区：[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

出　　处：《辐射研究与辐射工艺学报》2023年第5期81-88,共8页Journal of Radiation Research and Radiation Processing

基　　金：国家自然科学基金项目(11935001)资助~~。

摘　　要：本文基于Φ7.5 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Kmax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。This study investigated a method of measuring the absorbed dose rate ofγ-ray in air using aΦ7.5 cm×7.5 cm NaI(Tl)detector.Simulation of the NaI(Tl)detector using the Monte Carlo method was performed to obtain theγ-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 

分 类 号：TL11[核科学技术—核能科学]