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Detection efficiency calibration for an array of fourteen HPGe detectors

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Title
Detection efficiency calibration for an array of fourteen HPGe detectors
Author(s)
S.Y. Park; K.I. Hahn; W.G. Kang; Kazalov, V.; G.W. Kim; Y.D. Kim; E.K. Lee; M.H. Lee; D.S. Leonard; Sala, E.; J.H. So; S.C. Yoon
Publication Date
2023-03
Journal
Applied Radiation and Isotopes, v.193
Publisher
Elsevier Ltd
Abstract
The CUP array of germanium (CAGe) is an array of fourteen high-purity germanium (HPGe) detectors. The detection efficiency of full-energy-peak emitted from the various samples assayed on the CAGe was calculated using the Monte Carlo simulation toolkit GEANT4. If the dead layer on the surface of the crystal is treated in the simulation as a continuous part of the active crystal, then the detection efficiency will be overestimated. Thus, the detection efficiency of the CAGe was adjusted using multi-nuclide source data and Monte Carlo simulations. The gamma spectra of the known activity source were obtained for each HPGe detector of the CAGe. The detection efficiency measured by the multi-source data was smaller than that of simulation data if the simulation treated the whole volume of germanium crystals as active for gamma detection. By optimizing the dead layers’ thicknesses in the simulation, the detection efficiency calculated by the simulation could be matched to that of multi-source data. © 2023
URI
https://pr.ibs.re.kr/handle/8788114/13055
DOI
10.1016/j.apradiso.2023.110654
ISSN
0969-8043
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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