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Title: Neutron and gamma-ray energy reconstruction for characterization of special nuclear material

Abstract

Characterization of special nuclear material may be performed using energy spectroscopy of either the neutron or gamma-ray emissions from the sample. Gamma-ray spectroscopy can be performed relatively easily using high-resolution semiconductors such as high-purity germanium. Neutron spectroscopy, by contrast, is a complex inverse problem. Here, results are presented for 252Cf and PuBe energy spectra unfolded using a single EJ309 organic scintillator; excellent agreement is observed with the reference spectra. Neutron energy spectroscopy is also possible using a two-plane detector array, whereby time-offlight kinematics can be used. With this system, energy spectra can also be obtained as a function of position. Finally, spatial-dependent energy spectra are presented for neutron and gamma-ray sources that are in excellent agreement with expectations.

Authors:
 [1];  [1];  [1];  [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22)
OSTI Identifier:
1454794
Grant/Contract Number:  
NA0002534
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Engineering and Technology
Additional Journal Information:
Journal Volume: 49; Journal Issue: 6; Journal ID: ISSN 1738-5733
Publisher:
Korean Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Neutron spectroscopy; Spectrum unfolding; Neutron imaging

Citation Formats

Clarke, Shaun D., Hamel, Michael C., Di fulvio, Angela, and Pozzi, Sara A. Neutron and gamma-ray energy reconstruction for characterization of special nuclear material. United States: N. p., 2017. Web. doi:10.1016/j.net.2017.06.005.
Clarke, Shaun D., Hamel, Michael C., Di fulvio, Angela, & Pozzi, Sara A. Neutron and gamma-ray energy reconstruction for characterization of special nuclear material. United States. doi:10.1016/j.net.2017.06.005.
Clarke, Shaun D., Hamel, Michael C., Di fulvio, Angela, and Pozzi, Sara A. Fri . "Neutron and gamma-ray energy reconstruction for characterization of special nuclear material". United States. doi:10.1016/j.net.2017.06.005. https://www.osti.gov/servlets/purl/1454794.
@article{osti_1454794,
title = {Neutron and gamma-ray energy reconstruction for characterization of special nuclear material},
author = {Clarke, Shaun D. and Hamel, Michael C. and Di fulvio, Angela and Pozzi, Sara A.},
abstractNote = {Characterization of special nuclear material may be performed using energy spectroscopy of either the neutron or gamma-ray emissions from the sample. Gamma-ray spectroscopy can be performed relatively easily using high-resolution semiconductors such as high-purity germanium. Neutron spectroscopy, by contrast, is a complex inverse problem. Here, results are presented for 252Cf and PuBe energy spectra unfolded using a single EJ309 organic scintillator; excellent agreement is observed with the reference spectra. Neutron energy spectroscopy is also possible using a two-plane detector array, whereby time-offlight kinematics can be used. With this system, energy spectra can also be obtained as a function of position. Finally, spatial-dependent energy spectra are presented for neutron and gamma-ray sources that are in excellent agreement with expectations.},
doi = {10.1016/j.net.2017.06.005},
journal = {Nuclear Engineering and Technology},
number = 6,
volume = 49,
place = {United States},
year = {2017},
month = {6}
}

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Figures / Tables:

Fig. 1 Fig. 1: Unfolded neutron energy spectrum from 252Cf detected with an EJ-309 liquid scintillator; the Watt spectrum from Mannhart [7] is shown for reference.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.