Monte Carlo simulation of HPGe gamma‐spectrometry systems. Issue 23 (31st October 2019)

• Record Type: Journal Article
• Authors: Hou, Dongjie; Guo, Siming; Huang, Jianwei; Wu, Chong; Wu, Jinjie
• Is Part Of: Journal of engineering. Volume 2019:Issue 23(2019)
• Page Start: 9064
• Page End: 9068
• Publication Date: 2019-10-31
• Subjects: calibration -- gamma‐ray detection -- gamma‐ray spectroscopy -- Monte Carlo methods -- radioactive sources -- radioisotopes -- germanium radiation detectors; source distribution -- Monte Carlo simulation -- HPGe gamma‐spectrometry systems -- detection efficiency -- high purity germanium gamma‐spectrometry system -- radioactive source -- maximum absolute efficiency locates -- radionuclides -- dead layer -- distance 15.0 cm -- distance 20.0 cm -- distance 25.0 cm -- distance 50.0 cm; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.9185
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : In order to obtain the relationship between energy and channel, the suitable radionuclides are chosen to calibrate. The result shows a goodness of fitting. The Monte Carlo simulation about the detection efficiency of the high purity germanium (HPGe) gamma‐spectrometry system was performed. The distance between radioactive source and the end cap is set 15, 20, 25 and 50 cm, respectively. The maximum absolute efficiency locates at around 80 keV. It can be concluded that the absolute efficiency is declining accompany with the increasing of distance. In the end, at the distance of 25 cm, the authors changed thickness of the dead layer and the source distribution to calculate. The maximum absolute efficiency is 8.56E−03, and the relative deviation is 0.0011. Then it was compared with the experimental result provided with the manufacturer. The result of simulation shows a certain agreement with the experimental results. This work will be helpful for calculating the efficiency of HPGe gamma‐spectrometry.