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Title: New approach for calibration the efficiency of HpGe detectors

This work evaluates the efficiency calibrating of HpGe detector coupled with Canberra GC3018 with Genie 2000 software and Ortec GEM25-76-XLB-C with Gamma Vision software; available at Neutron activation analysis laboratory in Malaysian Nuclear Agency (NM). The efficiency calibration curve was constructed from measurement of an IAEA, standard gamma–point sources set composed by {sup 214}Am, {sup 57}Co, {sup 133}Ba, {sup 152}Eu, {sup 137}Cs and {sup 60}Co. The efficiency calibrations were performed for three different geometries: 5, 10 and 15 cm distances from the end cap detector. The polynomial parameters functions were simulated through a computer program, MATLAB in order to find an accurate fit to the experimental data points. The efficiency equation was established from the known fitted parameters which allow for the efficiency evaluation at particular energy of interest. The study shows that significant deviations in the efficiency, depending on the source-detector distance and photon energy.
Authors:
 [1] ;  [2] ;  [3] ; ; ;  [4]
  1. Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia and Department of Physics, Faculty of Pure and Applied Science, International University of Africa, 12223 Khartoum (Sudan)
  2. Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor (Malaysia)
  3. Faculty of Defence Science and Technology, National Defence University of Malaysia, Kem Sungai Besi, 57000 Kuala Lumpur (Malaysia)
  4. Malaysia Nuclear Agency (MNA), Bangi, 43000 Kajang, Selangor (Malaysia)
Publication Date:
OSTI Identifier:
22266084
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1584; Journal Issue: 1; Conference: iNuSTEC2013: International nuclear science, technology and engineering conference 2013, Kuala Lumpur (Malaysia), 30 Sep - 2 Oct 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; BARIUM 133; CALIBRATION; CESIUM 137; COBALT 57; COBALT 60; EFFICIENCY; EUROPIUM 152; EVALUATION; HIGH-PURITY GE DETECTORS; IAEA; NEUTRON ACTIVATION ANALYSIS; POLYNOMIALS; SIMULATION