宽能平面型HPGe探测器能量刻度及MC模拟

doi:10.3969/j.issn.1000-1158.2021.11.16

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摘要为更好服务于环境辐射监测,通过标准放射点源241Am、133Ba、60Co、137Cs、152Eu对平面型HPGe探测器进行标定,分别获得不同特征能量下的探测效率、半高宽、道址等数据。数据处理后得到能量-道址函数、FWHM能量刻度函数、能量与探测效率关系,同时求得能量分辨率为1.58keV(60Co,1.33MeV)。通过对比发现,利用CT技术建立的MC模型更加可靠、高效。通过修正上、下死层厚度依次分段对模型探测效率进行校正,得到整体探测效率相对误差在5%以内,与实验结果符合较好。

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	严永强
	孙圣涛
	吴金杰
	金尚忠
	赵瑞

关键词 ：计量学, 辐射监测, HPGe探测器, 能量刻度, MC模拟, 死层厚度

Abstract：In order to better serve environmental radiation monitoring, the planer HPGe spectrometer is calibrated by standard radioactive point sources 241Am, 133Ba, 60Co, 137Cs, 152Eu. And the detection efficiency, half height full width, channel address and other data under different energy are obtained respectively. After data processing, the function of energy-channel, function of FWHM-energy scale, relationship of energy and detection efficiency are obtained. At the same time, the energy resolution is 1.58keV (60Co, 1.33Mev). It is found that the MC model established by CT technology is more reliable and efficient. At the same time, the detection efficiency of the model is corrected by the upper dead layer and the bottom dead layer thickness in turn, and the relative error of the overall detection efficiency is within 5%, which is in good agreement with the actual experimental results.

Key words： metrology radiation monitoring HPGe detector energy calibration;MC simulation dead layer thickness

收稿日期: 2020-04-26 发布日期: 2021-12-01

PACS:

TB98

基金资助:国家重点研发计划(2017YFF0205101)

通讯作者: 吴金杰(1981-),男,浙江东阳人,中国计量科学研究院研究员,主要从事辐射计量研究。Email: wujj@nim.ac.cn E-mail: wujj@nim.ac.cn

作者简介: 严永强(1996-),男,浙江衢州人,硕士,研究方向为环境辐射监测。Email: 845113677@qq.com

引用本文:

严永强,孙圣涛,吴金杰,金尚忠,赵瑞. 宽能平面型HPGe探测器能量刻度及MC模拟[J]. 计量学报, 2021, 42(11): 1511-1516.
YAN Yong-qiang,SUN Sheng-tao,WU Jin-jie,JIN Shang-zhong,ZHAO Rui. Energy Calibration and MC Simulation of Broad Energy Planar HPGe Detector. Acta Metrologica Sinica, 2021, 42(11): 1511-1516.

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［1］刘华, 赵顺平, 梁梅燕, 等. 我国辐射环境监测的回顾与展望［J］. 辐射防护, 2008, (6): 30-44.
Liu H, Zhao S P, Liang M Y, et al. Review and Prospect of radiation environmental monitoring in China［J］. Radiation protection, 2008, (6): 30-44.
［2］陆小军, 何林锋, 忻智炜. 利用手持式γ核素识别仪快速检测石材中γ放射性核素含量［J］. 计量学报, 2019, 40(3): 526-529.
Lu X J, He L F, Xin Z W. Rapid detection of gamma radionuclide content in stone by handheld gamma nuclide detector［J］. Acta metrologica Sinica, 2019, 40(3): 526-529.
［3］全国环境天然放射性水平调查总结报告编写小组. 全国环境天然贯穿辐射水平调查研究(1983—1990年)［J］. 辐射防护, 1992, (2): 18-43.
Compilation team of national survey report on natural environmental radioactivity level. National survey on natural environmental penetrating radiation level (1983—1990)［J］. Radiation protection, 1992, (2): 18-43.
［4］复旦大学, 清华大学, 北京大学. 原子核物理实验方法［M］. 北京: 原子能出版社, 1985: 146-152.
［5］牟婉君, 李梅, 李国平. HPGe γ谱仪点源效率与探测高度的相关性研究［J］. 核电子学与探测技术, 2010, 30(7): 960-963.
Mu W J, Li M, Li G P. Relativity analysis of the efficiency of point sources and detection height by HPGe γ spectrometer［J］. Nuclear Electronics & Detection Technology, 2010, 30(7): 960-963.
［6］白立新, 徐家云, 吴丽萍, 等. HPGe γ谱仪体源效率与源高度和密度的关系［J］. 四川大学学报, 2004, 41(1): 126-130.
Bai L X, Xu J Y, Wu L P, et al. Relationship of the HPGe γ-spectrometer detection efficiency with sample height and density［J］. Journal of Sichuan University, 2004, 41(1): 126-130.
［7］王崇杰, 张爱莲, 吕建洲. HPGe γ探测器的点源效率函数及其参数确定［J］. 核技术, 2006, 29(1): 77-80.
Wang C J, Zhang A L, Lü J Z. Efficiency function of HPGe γ detector to point sources and determination of its parameters［J］. Nuclear Techniques, 2006, 29(1): 77-80.
［8］张海青, 倪邦发, 田伟之, 等. HPGe探测器点源效率与其空间位置的函数关系［J］. 核技术, 2010, 33(11): 839-843.
Zhang H Q, Ni B F, Tian W Z, et al. The determination of functional relationship between point source efficiency and its space position for an HPGe detector［J］. Nuclear Techniques, 2010, 33(11): 839-843.
［9］钦佩, 唐斌, 傅玉川, 等. 低能电子轫致辐射的蒙特卡罗模拟［J］. 辐射研究与辐射工艺学报, 2009, 27(6): 337-340.
Qin P, Tang B, Fu Y C, et al. Monte Carlo simulation of bremsstrahlung of low energy electrons［J］. Journal of radiation research and radiation technology, 2009, 27(6): 337-340.
［10］李泉凤, 吴莹英, 黄蔚玲. 电子加速器X射线发射率的MCNP分析［J］. 清华大学学报(自然科学版), 2004, 44(3): 304-306.
Li Q F, Wu Y Y, Huang W L. MCNP analysis of X-ray emissions in an electron accelerator%［J］. Journal of Tsinghua University (NATURAL SCIENCE EDITION), 2004, 44(3): 304-306.
［11］王同权, 张树发, 王尚武, 等. 电子在材料中输运的蒙特卡罗模拟［J］. 国防科技大学学报, 2000, 22(1): 81-84.
Wang T Q, Zhang S F, Wang S W, et al. Monte Carlo simulation of electron transport in material［J］. Journal of National University of Defense Science and technology, 2000, 22(1): 81-84.
［12］郭广水, 曾心苗, 周鹏, 等. 基于MCNP程序的铅屏蔽层对γ射线屏蔽性能研究［J］. 原子能科学技术, 2010,(B9): 587-590.
Guo G S, Zeng X M, Zhou P, et al. Study on shielding performance of lead shielding layer to γ-ray based on MCNP program［J］. Atomic energy science and technology, 2010,(B9): 587-590.
［13］黄建微, 王乃彦. 基于蒙特卡罗方法的NaI探测器效率刻度及其测量轫致辐射实验［J］. 物理学报, 2014, 63(18): 180702.
Huang J W, Wang N Y. Efficiency calibration and bremsstrahlung measurement of NaI detector based on Monte Carlo method［J］. Journal of physics, 2014, 63(18): 180702.
［14］Hardy J C, Iacob V E, Sanchez-Vega M, et al. Precise efficiency calibration of an HPGe detector: Source measurements and Monte Carlo calculations with sub-percent precision［J］. Applied Radiation and Isotopes, 2002, 56(1-2): 65-69.
［15］Kishikawa T, Nishimura K, Noguchi S, et al. Energy calibration: Peak position variation by the use of 192Ir as a reference standard source with HPGe detectors［J］. Applied Radiation & Isotopes, 1993, 44( 10–11):1389-1398.
［16］Pibida L, Nafee S S, Unterweger M, et al. Calibration of HPGe gamma-ray detectors for measurement of radioactive noble gas sources［J］. Applied Radiation & Isotopes, 2007, 65(2): 225-233.
［17］张帅, 吴金杰, 吴冲, 等. HPGe探测器能量刻度及探测效率模拟［J］. 核电子学与探测技术, 2016, 36(5): 517-520.
Zhang S, Wu J J, Wu C, et al. Simulation of energy calibration and detection efficiency of HPGe detector［J］. Nuclear electronics and detection technology, 2016, 36(5): 517-520.
［18］李德红, 黄建微, 沙比哈·吐尔逊, 等. g因子的蒙特卡罗模拟计算［J］. 计量学报, 2019, 40(5): 920-923.
Li D H, Huang J W, Shabiha Tuerxun, et al. Monte Carlo Simulation Method for g Factor［J］. Acta Metrologica Sinica, 2019, 40(5): 920-923.
［19］朱传新, 陈渊, 郭海萍, 等. 高纯锗探测器探测效率研究［J］. 核电子学与探测技术, 2006, 26(2): 191-194.
Zhu C X, Chen Y, Guo H P, et al. Study on the detection efficiency of high purity germanium detector［J］. Nuclear electronics and detection technology, 2006, 26(2): 191-194.