Calculation of coincidence summing corrections for a specific small soil sample geometry

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Previously, a system was developed at the INEL for measuring the {gamma}-ray emitting nuclides in small soil samples for the purpose of environmental monitoring. These samples were counted close to a {approx}20% Ge detector and, therefore, it was necessary to take into account the coincidence summing that occurs for some nuclides. In order to improve the technical basis for the coincidence summing corrections, the authors have carried out a study of the variation in the coincidence summing probability with position within the sample volume. A Monte Carlo electron and photon transport code (CYLTRAN) was used to compute peak and total ... continued below

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14 p.

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Helmer, R.G. & Gehrke, R.J. October 1, 1996.

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Previously, a system was developed at the INEL for measuring the {gamma}-ray emitting nuclides in small soil samples for the purpose of environmental monitoring. These samples were counted close to a {approx}20% Ge detector and, therefore, it was necessary to take into account the coincidence summing that occurs for some nuclides. In order to improve the technical basis for the coincidence summing corrections, the authors have carried out a study of the variation in the coincidence summing probability with position within the sample volume. A Monte Carlo electron and photon transport code (CYLTRAN) was used to compute peak and total efficiencies for various photon energies from 30 to 2,000 keV at 30 points throughout the sample volume. The geometry for these calculations included the various components of the detector and source along with the shielding. The associated coincidence summing corrections were computed at these 30 positions in the sample volume and then averaged for the whole source. The influence of the soil and the detector shielding on the efficiencies was investigated.

Physical Description

14 p.

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INIS; OSTI as DE96015243

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  • Advances in alpha-, beta-, and gamma-ray spectrometry, St. Petersburg (Russian Federation), 18-20 Sep 1996

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  • Other: DE96015243
  • Report No.: INEL--96/00187
  • Report No.: CONF-9609258--1
  • Grant Number: AC07-94ID13223
  • Office of Scientific & Technical Information Report Number: 392795
  • Archival Resource Key: ark:/67531/metadc687387

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  • October 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 24, 2016, 7:02 p.m.

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Helmer, R.G. & Gehrke, R.J. Calculation of coincidence summing corrections for a specific small soil sample geometry, article, October 1, 1996; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc687387/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.