Lithium Loaded Glass Fiber Neutron Detector Tests

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Radiation portal monitors used for interdiction of illicit materials at borders include highly sensitive neutron detection systems. The main reason for having neutron detection capability is to detect fission neutrons from plutonium. The currently deployed radiation portal monitors (RPMs) from Ludlum and Science Applications International Corporation (SAIC) use neutron detectors based upon 3He-filled gas proportional counters, which are the most common large neutron detector. There is a declining supply of 3He in the world and, thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and sensitivity to cargo-borne neutrons are ... continued below

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Ely, James H.; Erikson, Luke E.; Kouzes, Richard T.; Lintereur, Azaree T. & Stromswold, David C. November 12, 2009.

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Radiation portal monitors used for interdiction of illicit materials at borders include highly sensitive neutron detection systems. The main reason for having neutron detection capability is to detect fission neutrons from plutonium. The currently deployed radiation portal monitors (RPMs) from Ludlum and Science Applications International Corporation (SAIC) use neutron detectors based upon 3He-filled gas proportional counters, which are the most common large neutron detector. There is a declining supply of 3He in the world and, thus, methods to reduce the use of this gas in RPMs with minimal changes to the current system designs and sensitivity to cargo-borne neutrons are being investigated. Four technologies have been identified as being currently commercially available, potential alternative neutron detectors to replace the use of 3He in RPMs. Reported here are the results of tests of the lithium-loaded glass fibers option. This testing measured the neutron detection efficiency and gamma ray rejection capabilities of a small system manufactured by Nucsafe (Oak Ridge, TN).

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  • Report No.: PNNL-18988
  • Grant Number: AC05-76RL01830
  • DOI: 10.2172/969174 | External Link
  • Office of Scientific & Technical Information Report Number: 969174
  • Archival Resource Key: ark:/67531/metadc932942

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Creation Date

  • November 12, 2009

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 6, 2016, 12:32 p.m.

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Ely, James H.; Erikson, Luke E.; Kouzes, Richard T.; Lintereur, Azaree T. & Stromswold, David C. Lithium Loaded Glass Fiber Neutron Detector Tests, report, November 12, 2009; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc932942/: accessed July 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.