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Title: Neutron spectrometer for improved SNM search.

Abstract

With the exception of large laboratory devices with very low sensitivities, a neutron spectrometer have not been built for fission neutrons such as those emitted by special nuclear materials (SNM). The goal of this work was to use a technique known as Capture Gated Neutron Spectrometry to develop a solid-state device with this functionality. This required modifications to trans-stilbene, a known solid-state scintillator. To provide a neutron capture signal we added lithium to this material. This unique triggering signal allowed identification of neutrons that lose all of their energy in the detector, eliminating uncertainties that arise due to partial energy depositions. We successfully implemented a capture gated neutron spectrometer and were able to distinguish an SNM like fission spectrum from a spectrum stemming from a benign neutron source.

Authors:
;
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
908879
Report Number(s):
SAND2007-1570
TRN: US0703788
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CAPTURE; FISSION; FISSION NEUTRONS; LITHIUM; MODIFICATIONS; NEUTRON REACTIONS; NEUTRON SOURCES; NEUTRON SPECTROMETERS; NEUTRON SPECTROSCOPY; NEUTRONS; Nuclear materials-Monitoring.; Nuclear reactors-Materials.; Nuclear power plants-Materials.; Nuclear spectroscopy.

Citation Formats

Vance, Andrew L., and Aigeldinger, Georg. Neutron spectrometer for improved SNM search.. United States: N. p., 2007. Web. doi:10.2172/908879.
Vance, Andrew L., & Aigeldinger, Georg. Neutron spectrometer for improved SNM search.. United States. doi:10.2172/908879.
Vance, Andrew L., and Aigeldinger, Georg. Thu . "Neutron spectrometer for improved SNM search.". United States. doi:10.2172/908879. https://www.osti.gov/servlets/purl/908879.
@article{osti_908879,
title = {Neutron spectrometer for improved SNM search.},
author = {Vance, Andrew L. and Aigeldinger, Georg},
abstractNote = {With the exception of large laboratory devices with very low sensitivities, a neutron spectrometer have not been built for fission neutrons such as those emitted by special nuclear materials (SNM). The goal of this work was to use a technique known as Capture Gated Neutron Spectrometry to develop a solid-state device with this functionality. This required modifications to trans-stilbene, a known solid-state scintillator. To provide a neutron capture signal we added lithium to this material. This unique triggering signal allowed identification of neutrons that lose all of their energy in the detector, eliminating uncertainties that arise due to partial energy depositions. We successfully implemented a capture gated neutron spectrometer and were able to distinguish an SNM like fission spectrum from a spectrum stemming from a benign neutron source.},
doi = {10.2172/908879},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}

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