skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Detection of special nuclear material from delayed neutron emission induced by a dual-particle monoenergetic source

Abstract

Detection of unique signatures of special nuclear materials is critical for their interdiction in a variety of nuclear security and nonproliferation scenarios. We report on the observation of delayed neutrons from fission of uranium induced in dual-particle active interrogation based on the {sup 11}B(d,n γ){sup 12}C nuclear reaction. Majority of the fissions are attributed to fast fission induced by the incident quasi-monoenergetic neutrons. A Li-doped glass–polymer composite scintillation neutron detector, which displays excellent neutron/γ discrimination at low energies, was used in the measurements, along with a recoil-based liquid scintillation detector. Time-dependent buildup and decay of delayed neutron emission from {sup 238}U were measured between the interrogating beam pulses and after the interrogating beam was turned off, respectively. Characteristic buildup and decay time profiles were compared to the common parametrization into six delayed neutron groups, finding a good agreement between the measurement and nuclear data. This method is promising for detecting fissile and fissionable materials in cargo scanning applications and can be readily integrated with transmission radiography using low-energy nuclear reaction sources.

Authors:
 [1]; ;  [2]
  1. Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
  2. Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States)
Publication Date:
OSTI Identifier:
22590627
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 26; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BORON 11; CARBON 12; CARGO; DELAYED NEUTRONS; DOPED MATERIALS; FAST FISSION; FISSIONABLE MATERIALS; LIQUID SCINTILLATION DETECTORS; NEUTRON DETECTORS; NEUTRON EMISSION; TIME DEPENDENCE; URANIUM 238

Citation Formats

Mayer, M., Nattress, J., and Jovanovic, I., E-mail: ijov@umich.edu. Detection of special nuclear material from delayed neutron emission induced by a dual-particle monoenergetic source. United States: N. p., 2016. Web. doi:10.1063/1.4955051.
Mayer, M., Nattress, J., & Jovanovic, I., E-mail: ijov@umich.edu. Detection of special nuclear material from delayed neutron emission induced by a dual-particle monoenergetic source. United States. doi:10.1063/1.4955051.
Mayer, M., Nattress, J., and Jovanovic, I., E-mail: ijov@umich.edu. Mon . "Detection of special nuclear material from delayed neutron emission induced by a dual-particle monoenergetic source". United States. doi:10.1063/1.4955051.
@article{osti_22590627,
title = {Detection of special nuclear material from delayed neutron emission induced by a dual-particle monoenergetic source},
author = {Mayer, M. and Nattress, J. and Jovanovic, I., E-mail: ijov@umich.edu},
abstractNote = {Detection of unique signatures of special nuclear materials is critical for their interdiction in a variety of nuclear security and nonproliferation scenarios. We report on the observation of delayed neutrons from fission of uranium induced in dual-particle active interrogation based on the {sup 11}B(d,n γ){sup 12}C nuclear reaction. Majority of the fissions are attributed to fast fission induced by the incident quasi-monoenergetic neutrons. A Li-doped glass–polymer composite scintillation neutron detector, which displays excellent neutron/γ discrimination at low energies, was used in the measurements, along with a recoil-based liquid scintillation detector. Time-dependent buildup and decay of delayed neutron emission from {sup 238}U were measured between the interrogating beam pulses and after the interrogating beam was turned off, respectively. Characteristic buildup and decay time profiles were compared to the common parametrization into six delayed neutron groups, finding a good agreement between the measurement and nuclear data. This method is promising for detecting fissile and fissionable materials in cargo scanning applications and can be readily integrated with transmission radiography using low-energy nuclear reaction sources.},
doi = {10.1063/1.4955051},
journal = {Applied Physics Letters},
number = 26,
volume = 108,
place = {United States},
year = {Mon Jun 27 00:00:00 EDT 2016},
month = {Mon Jun 27 00:00:00 EDT 2016}
}