Final Report: Water-Based Neutron Detector Technology for Material Characterization Well Counters

Technical Report · Thu Jan 09 00:00:00 EST 2014

DOI:https://doi.org/10.2172/1116970· OSTI ID:1116970

Dazeley, Steven ^[1]; Asghari, Alexandra ^[1]; Bernstein, Adam ^[1]; Bowden, Nathaniel ^[1]; Mozin, Vladimir ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Coincidence counting of neutron pairs is an effective way to non-destructively determine the amount of fissile material within a sample of special nuclear material (SNM) [1]. Multiplicity counting is more versatile and precise, but also more demanding, requiring the detection of three or more neutrons per single fission event. Detecting a triple coincidence of neutrons depends on the 3rd power of the detection efficiency and so on. The detection efficiency quickly becomes the critical determining factor in evaluating the utility of a particular neutron multiplicity detection technique. The purpose of this feasibility study was to characterize the performance of an LLNLdesigned water Cherenkov based Multiplicity Well counter.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 1116970
• Report Number(s): LLNL-TR-648508
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS