Energy Calibration and MC Simulation of Broad Energy Planar HPGe Detector

YAN Yong-qiang; SUN Sheng-tao; WU Jin-jie; JIN Shang-zhong; ZHAO Rui

doi:10.3969/j.issn.1000-1158.2021.11.16

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Acta Metrologica Sinica ›› 2021, Vol. 42 ›› Issue (11) : 1511-1516. DOI: 10.3969/j.issn.1000-1158.2021.11.16

Energy Calibration and MC Simulation of Broad Energy Planar HPGe Detector

YAN Yong-qiang^1,3,SUN Sheng-tao³,WU Jin-jie³,JIN Shang-zhong^1,2,ZHAO Rui³

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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

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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[J]. Acta Metrologica Sinica. 2021, 42(11): 1511-1516 https://doi.org/10.3969/j.issn.1000-1158.2021.11.16

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