A Germanium Detector with Optimized Compton Veto for High Sensitivity at Low Energy

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We have built a prototype germanium detector with a Compton veto that is optimized for high sensitivity in the low-energy range around {approx}100 keV. It is specifically designed to address the problem to directly detect plutonium gamma emissions in spent nuclear fuel by non-destructive assay. This is not possible with current detectors due to the large low-energy background of Compton-scattered high-energy radiation from the fission products, whose gamma flux is at least 6 to 7 orders of magnitude higher than the Pu signal. Our instrument is designed to assess the feasibility to selectively suppress the background in the low-energy region ... continued below

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PDF-file: 11 pages; size: 4.3 Mbytes

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Friedrich, S November 30, 2011.

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We have built a prototype germanium detector with a Compton veto that is optimized for high sensitivity in the low-energy range around {approx}100 keV. It is specifically designed to address the problem to directly detect plutonium gamma emissions in spent nuclear fuel by non-destructive assay. This is not possible with current detectors due to the large low-energy background of Compton-scattered high-energy radiation from the fission products, whose gamma flux is at least 6 to 7 orders of magnitude higher than the Pu signal. Our instrument is designed to assess the feasibility to selectively suppress the background in the low-energy region around {approx}100 keV with the strongest Pu X-ray and gamma emissions lines. It employs a thin Ge detector with a large Compton veto directly behind it to suppress the background from forward-scattered radiation by anti-coincidence vetoing. This report summarizes the design considerations and the performance of the instrument.

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PDF-file: 11 pages; size: 4.3 Mbytes

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  • Report No.: LLNL-TR-518852
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/1033733 | External Link
  • Office of Scientific & Technical Information Report Number: 1033733
  • Archival Resource Key: ark:/67531/metadc836293

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  • November 30, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Nov. 28, 2016, 6:54 p.m.

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Friedrich, S. A Germanium Detector with Optimized Compton Veto for High Sensitivity at Low Energy, report, November 30, 2011; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc836293/: accessed June 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.