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A sourceless efficiency calibration method based on the coupling of Monte Carlo simulation and analytical calculation |
WU Zhen1,2, SU Pengwen1, WANG Yujian1, ZHANG Hui1, QIU Rui1, LI Junli1 |
1. Department of Engineering Physics, Tsinghua University, Beijing 100084 China; 2. Nuctech Company Limited, Beijing 100084 China |
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Abstract Objective To establish a sourceless efficiency calibration method by coupling Monte Carlo simulation with analytical calculation. Methods Monte Carlo simulation was used to calculate the point-to-point detection efficiency of specific detectors to establish a detection efficiency grid. The detection efficiency of point source, disc, cylindrical, beaker, spherical, U-tube and Marlin cup samples was analyzed using numerical integration method after detection efficiency grid interpolation.Results The above coupling method was used for sourceless efficiency calibration. Within the energy range of 0.2–3 MeV, the relative deviation of calibration between coupling method and Monte Carlo simulation was mostly less than 10%, the maximum relative deviation was 18.06%, and the computation time was reduced by at least 86%. The above coupling method was used for sourceless efficiency calibration of an HPGe detector manufactured by ORTEC for point source detection, which was in good agreement with the experimental calibration, and the relative deviations were less than 10%.Conclusion This method can be generalized and used in the sourceless efficiency calibration of HPGe, LaBr3, and NaI detectors.
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Received: 20 April 2022
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[1] 陈立, 马豪, 曾志, 等. 基于蒙特卡罗的HPGe伽马谱仪无源效率刻度方法[J]. 强激光与粒子束,2013,25(1):201-206. DOI: 10.3788/HPLPB20132501.0201 Chen L, Ma H, Zeng Z, et al. Monte Carlo-based sourceless efficiency calibration method of HPGe γ spectrometer[J]. High Power Laser Part Beams, 2013, 25(1): 201-206. DOI: 10.3788/HPLPB20132501.0201 [2] 丁洪林, 张秀凤. 半导体探测器及其应用[M]. 北京: 原子能出版社, 1989: 1-48. Ding HL, Zhang XF. Semiconductor detector and its application[M]. Beijing: Atomic Energy Press, 1989: 1-48. [3] 安继刚. 致电离辐射探测学讲义(上册)[M]. 北京: 清华大学出版社, 1993: 199-256. An JG. Ionizing radiation detection[M]. Beijing: Tsinghua University Publishing House Co. , Ltd, 1993: 199-256. [4] 杨悦. 高纯锗γ谱仪体源效率刻度方法的对比研究及应用[D]. 南昌: 东华理工大学, 2019: 7-13. Yang Y. Approaches for efficiency calibration of volume source with HPGe γ-ray spectrometry: comparative study and application[D]. Nanchang: East China University of Technology, 2019: 7-13. [5] 付杰, 徐翠华. 无源效率刻度技术研究进展及应用概况[J]. 核电子学与探测技术,2007,27(4):799-804. DOI: 10.3969/j.issn.0258-0934.2007.04.047 Fu J, Xu CH. Research and application of sourceless efficiency calibration technic[J]. Nucl Electron Detect Technol, 2007, 27(4): 799-804. DOI: 10.3969/j.issn.0258-0934.2007.04.047 [6] Badawi MS, Gouda MM, Nafee SS, et al. New algorithm for studying the effect of self attenuation factor on the efficiency of γ-rays detectors[J]. Nucl Instrum Methods Phys Res A, 2012, 696: 164-170. DOI: 10.1016/j.nima.2012.08.089 [7] Badawi MS, Gouda MM, Nafee SS, et al. New analytical approach to calibrate the co-axial HPGe detectors including correction for source matrix self-attenuation[J]. Appl Radiat Isot, 2012, 70(12): 2661-2668. DOI: 10.1016/j.apradiso.2012.08.014 [8] Saegusa J, Oishi T, Kawasaki K, et al. Determination of gamma-ray efficiency curves for volume samples by the combination of Monte Carlo simulations and point source calibration[J]. J Nucl Sci Technol, 2000, 37(12): 1075-1081. DOI: 10.1080/18811248.2000.9714994 [9] Venkataraman R, Bronson F, Atrashkevich V, et al. Improved detector response characterization method in ISOCS and LabSOCS[J]. J Radioanal Nucl Chem, 2005, 264(1): 213-219. DOI: 10.1007/s10967-005-0696-7 [10] 王硕, 杨宝路, 周强, 等. 无源效率刻度在马林杯状气体源活度测量中的应用[J]. 中国辐射卫生,2022,31(1):6-12. DOI: 10.13491/j.issn.1004-714X.2022.01.002 Wang S, Yang BL, Zhou Q, et al. Application of sourceless efficiency calibration in activity measurement of gas source in Marinelli beaker[J]. Chin J Radiol Health, 2022, 31(1): 6-12. DOI: 10.13491/j.issn.1004-714X.2022.01.002 [11] 赖忠俊, 宣志强, 俞顺飞, 等. 有源-无源γ能谱分析方法在分析环境样品中放射性核素的应用[J]. 中国辐射卫生,2020,29(4):378-381,386. DOI: 10.13491/j.issn.1004-714X.2020.04.014 Lai ZJ, Xuan ZQ, Yu SF, et al. Application of sources and sources-less methods of γ spectrometry for analysis of radionuclides in environmental sample[J]. Chin J Radiol Health, 2020, 29(4): 378-381,386. DOI: 10.13491/j.issn.1004-714X.2020.04.014 [12] 罗熹宇, 邱睿, 武祯, 等. 辐射防护设计与剂量计算软件THUDose的研发与应用[J]. 现代应用物理,2021,12(2):23-28. DOI: 10.12061/j.issn.2095-6223.2021.020203 Luo XY, Qiu R, Wu Z, et al. Development and application of radiation protection calculation software THUDose[J]. Mod Appl Phys, 2021, 12(2): 23-28. DOI: 10.12061/j.issn.2095-6223.2021.020203 [13] 曾奕, 徐彬, 陈立. 实验室无源效率刻度技术的准确性检验[J]. 四川环境,2011,30(3):5-9. DOI: 10.3969/j.issn.1001-3644.2011.03.002 Zeng Y, Xu B, Chen L. Calibration check for efficiency scale of sourceless detection in laboratory[J]. Sichuan Environ, 2011, 30(3): 5-9. DOI: 10.3969/j.issn.1001-3644.2011.03.002 [14] 李奇, 王世联, 樊元庆, 等. 无源效率刻度在活度测量中的应用研究[J]. 核电子学与探测技术,2013,33(5):568-571. DOI: 10.3969/j.issn.0258-0934.2013.05.011 Li Q, Wang SL, Fan YQ, et al. Application of sourceless efficiency calibration in activity measurement[J]. Nucl Electron Detect Technol, 2013, 33(5): 568-571. DOI: 10.3969/j.issn.0258-0934.2013.05.011
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