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Title: Prototype Neutron Energy Spectrometer

Abstract

The project goals are: (1) Use three to five pressurized helium tubes with varying polyethylene moderators to build a neutron energy spectrometer that is most sensitive to the incident neutron energy of interest. Neutron energies that are of particular interest are those from the fission neutrons (typically around 1-2 MeV); (2) Neutron Source Identification - Use the neutron energy 'selectivity' property as a tool to discriminate against other competing processes by which neutrons are generated (viz. Cosmic ray induced neutron production [ship effect], [a, n] reactions); (3) Determine the efficiency as a function of neutron energy (response function) of each of the detectors, and thereby obtain the composite neutron energy spectrum from the detector count rates; and (4) Far-field data characterization and effectively discerning shielded fission source. Summary of the presentation is: (1) A light weight simple form factor compact neutron energy spectrometer ready to be used in maritime missions has been built; (2) Under laboratory conditions, individual Single Neutron Source Identification is possible within 30 minutes. (3) Sources belonging to the same type of origin viz., (a, n), fission, cosmic cluster in the same place in the 2-D plot shown; and (4) Isotopes belonging to the same source originmore » like Cm-Be, Am-Be (a, n) or Pu-239, U-235 (fission) do have some overlap in the 2-D plot.« less

Authors:
Publication Date:
Research Org.:
National Security Technologies, LLC (United States)
Sponsoring Org.:
USDOE; USDOE National Nuclear Security Administration (NA)
OSTI Identifier:
992583
Report Number(s):
DOE/NV/25946-971
TRN: US1100396
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Conference
Resource Relation:
Conference: American Nuclear Society Annual Meeting; June 16, 2010
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; EFFICIENCY; FISSION; FISSION NEUTRONS; FORM FACTORS; HELIUM; MODERATORS; NEUTRON SOURCES; NEUTRONS; ORIGIN; POLYETHYLENES; PRODUCTION; SPECTROMETERS; neutron energy spectrometer, neutron source identification

Citation Formats

Stephen Mitchell, Sanjoy Mukhopadhyay, Richard Maurer, Ronald Wolff. Prototype Neutron Energy Spectrometer. United States: N. p., 2010. Web.
Stephen Mitchell, Sanjoy Mukhopadhyay, Richard Maurer, Ronald Wolff. Prototype Neutron Energy Spectrometer. United States.
Stephen Mitchell, Sanjoy Mukhopadhyay, Richard Maurer, Ronald Wolff. Wed . "Prototype Neutron Energy Spectrometer". United States. https://www.osti.gov/servlets/purl/992583.
@article{osti_992583,
title = {Prototype Neutron Energy Spectrometer},
author = {Stephen Mitchell, Sanjoy Mukhopadhyay, Richard Maurer, Ronald Wolff},
abstractNote = {The project goals are: (1) Use three to five pressurized helium tubes with varying polyethylene moderators to build a neutron energy spectrometer that is most sensitive to the incident neutron energy of interest. Neutron energies that are of particular interest are those from the fission neutrons (typically around 1-2 MeV); (2) Neutron Source Identification - Use the neutron energy 'selectivity' property as a tool to discriminate against other competing processes by which neutrons are generated (viz. Cosmic ray induced neutron production [ship effect], [a, n] reactions); (3) Determine the efficiency as a function of neutron energy (response function) of each of the detectors, and thereby obtain the composite neutron energy spectrum from the detector count rates; and (4) Far-field data characterization and effectively discerning shielded fission source. Summary of the presentation is: (1) A light weight simple form factor compact neutron energy spectrometer ready to be used in maritime missions has been built; (2) Under laboratory conditions, individual Single Neutron Source Identification is possible within 30 minutes. (3) Sources belonging to the same type of origin viz., (a, n), fission, cosmic cluster in the same place in the 2-D plot shown; and (4) Isotopes belonging to the same source origin like Cm-Be, Am-Be (a, n) or Pu-239, U-235 (fission) do have some overlap in the 2-D plot.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {6}
}

Conference:
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