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Title: Using standard calibrated geometries to characterize a coaxial high purity germanium gamma detector for Monte Carlo simulations

Abstract

A detector model optimization procedure based on matching Monte Carlo simulations with measurements for two experimentally calibrated sample geometries which are frequently used in radioactivity measurement laboratories results in relative agreement within 5% between simulated and measured efficiencies for a high purity germanium detector. The optimization procedure indicated that the increase in dead layer thickness is largely responsible for a detector efficiency decrease in time. The optimized detector model allows Monte Carlo efficiency calibration for all other samples of which the geometry and bulk composition is known. The presented method is a competitive and economic alternative to more elaborate detector scanning methods and results in a comparable accuracy.

Authors:
;  [1]
  1. KVI-Center for Advanced Radiation Technology (KVI-CART), University of Groningen, Zernikelaan 25, 9747 AA Groningen (Netherlands)
Publication Date:
OSTI Identifier:
22308815
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; CALIBRATION; COMPUTERIZED SIMULATION; EFFICIENCY; HIGH-PURITY GE DETECTORS; MONTE CARLO METHOD; OPTIMIZATION

Citation Formats

Graaf, E. R. van der, E-mail: vandergraaf@kvi.nl, Dendooven, P., and Brandenburg, S. Using standard calibrated geometries to characterize a coaxial high purity germanium gamma detector for Monte Carlo simulations. United States: N. p., 2014. Web. doi:10.1063/1.4882320.
Graaf, E. R. van der, E-mail: vandergraaf@kvi.nl, Dendooven, P., & Brandenburg, S. Using standard calibrated geometries to characterize a coaxial high purity germanium gamma detector for Monte Carlo simulations. United States. https://doi.org/10.1063/1.4882320
Graaf, E. R. van der, E-mail: vandergraaf@kvi.nl, Dendooven, P., and Brandenburg, S. 2014. "Using standard calibrated geometries to characterize a coaxial high purity germanium gamma detector for Monte Carlo simulations". United States. https://doi.org/10.1063/1.4882320.
@article{osti_22308815,
title = {Using standard calibrated geometries to characterize a coaxial high purity germanium gamma detector for Monte Carlo simulations},
author = {Graaf, E. R. van der, E-mail: vandergraaf@kvi.nl and Dendooven, P. and Brandenburg, S.},
abstractNote = {A detector model optimization procedure based on matching Monte Carlo simulations with measurements for two experimentally calibrated sample geometries which are frequently used in radioactivity measurement laboratories results in relative agreement within 5% between simulated and measured efficiencies for a high purity germanium detector. The optimization procedure indicated that the increase in dead layer thickness is largely responsible for a detector efficiency decrease in time. The optimized detector model allows Monte Carlo efficiency calibration for all other samples of which the geometry and bulk composition is known. The presented method is a competitive and economic alternative to more elaborate detector scanning methods and results in a comparable accuracy.},
doi = {10.1063/1.4882320},
url = {https://www.osti.gov/biblio/22308815}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 6,
volume = 85,
place = {United States},
year = {Sun Jun 15 00:00:00 EDT 2014},
month = {Sun Jun 15 00:00:00 EDT 2014}
}