Neutron crosstalk between liquid scintillators

Journal Article · Fri May 01 00:00:00 EDT 2015 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2015.04.019· OSTI ID:1262176

Verbeke, J. M.  ^[1]; Prasad, M. K. ^[1]; Snyderman, N. J. ^[1]

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

We propose a method to quantify the fractions of neutrons scattering between liquid scintillators. Using a spontaneous fission source, this method can be utilized to quickly characterize an array of liquid scintillators in terms of crosstalk. The point model theory due to Feynman is corrected to account for these multiple scatterings. Using spectral information measured by the liquid scintillators, fractions of multiple scattering can be estimated, and mass reconstruction of fissile materials under investigation can be improved. Monte Carlo simulations of mono-energetic neutron sources were performed to estimate neutron crosstalk. A californium source in an array of liquid scintillators was modeled to illustrate the improvement of the mass reconstruction.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1262176
• Alternate ID(s): OSTI ID: 1247260
• Report Number(s): LLNL-JRNL-666627
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 794, Issue C; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
98 NUCLEAR DISARMAMENT
SAFEGUARDS AND PHYSICAL PROTECTION
11 NUCLEAR FUEL CYCLE AND RUEL MATERIALS
Liquid scintillators
Crosstalk
Multiple scattering
Neutron multiplicity
Neutron correlation
Fissile materials