https://doi.org/10.1140/epjp/s13360-024-05891-9
Regular Article
Investigating the Impact of Source Geometry and Distance on HPGe Detector Efficiency Using MCNPX Simulations
1
Department of Physics, University of Guilan, University of Campus, Rasht, Iran
2
Department of Physics, Faculty of Sciences, University of Guilan, Rasht, Iran
Received:
27
November
2023
Accepted:
1
December
2024
Published online:
14
December
2024
The most important characteristic of HPGe detector is its efficiency, which depends on the geometry of the source and the detector material. Normally, efficiency is function of the gamma energy and must be determined for each specific material that is subject of the measurements. This requires secondary standard for each material, and it is expensive and time-consuming process. Monte Carlo method can be helpful as an alternative computational method to calculate the efficiency of HPGe detector. This paper describes a procedure for constructing a Monte Carlo model of an HPGe detector used to measure activity. In this work, the HPGe detector was completely simulated by MCNPX computational code according to the laboratory conditions and geometry of the Marinelli source. Comparison has shown the average difference of about 10% between the experimental and the Monte Carlo simulation efficiency of the HPGe detector. The detector efficiency for the source in cylindrical geometry with various dimensions and different distances between the source and the detector was calculated and studied.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
