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Title: Apparatus and method for identification of matrix materials in which transuranic elements are embedded using thermal neutron capture gamma-ray emission

Abstract

An invention is described that enables the quantitative simultaneous identification of the matrix materials in which fertile and fissile nuclides are embedded to be made along with the quantitative assay of the fertile and fissile materials. The invention also enables corrections for any absorption of neutrons by the matrix materials and by the measurement apparatus by the measurement of the prompt and delayed neutron flux emerging from a sample after the sample is interrogated by simultaneously applied neutrons and gamma radiation. High energy electrons are directed at a first target to produce gamma radiation. A second target receives the resulting pulsed gamma radiation and produces neutrons from the interaction with the gamma radiation. These neutrons are slowed by a moderator surrounding the sample and bathe the sample uniformly, generating second gamma radiation in the interaction. The gamma radiation is then resolved and quantitatively detected, providing a spectroscopic signature of the constituent elements contained in the matrix and in the materials within the vicinity of the sample. (LEW)

Inventors:
; ;
Issue Date:
Research Org.:
Los Alamos National Lab., NM (USA)
OSTI Identifier:
5620226
Application Number:
ON: DE85011659
Assignee:
Dept. of Energy EDB-85-087771
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; TRANSURANIUM ELEMENTS; CHEMICAL ANALYSIS; NEUTRON REACTIONS; CAPTURE; GAMMA SPECTRA; MATRIX MATERIALS; BARYON REACTIONS; ELEMENTS; HADRON REACTIONS; MATERIALS; NUCLEAR REACTIONS; NUCLEON REACTIONS; SPECTRA; 440100* - Radiation Instrumentation; 400101 - Activation, Nuclear Reaction, Radiometric & Radiochemical Procedures

Citation Formats

Close, D.A., Franks, L.A., and Kocimski, S.M. Apparatus and method for identification of matrix materials in which transuranic elements are embedded using thermal neutron capture gamma-ray emission. United States: N. p., 1984. Web.
Close, D.A., Franks, L.A., & Kocimski, S.M. Apparatus and method for identification of matrix materials in which transuranic elements are embedded using thermal neutron capture gamma-ray emission. United States.
Close, D.A., Franks, L.A., and Kocimski, S.M. Thu . "Apparatus and method for identification of matrix materials in which transuranic elements are embedded using thermal neutron capture gamma-ray emission". United States.
@article{osti_5620226,
title = {Apparatus and method for identification of matrix materials in which transuranic elements are embedded using thermal neutron capture gamma-ray emission},
author = {Close, D.A. and Franks, L.A. and Kocimski, S.M.},
abstractNote = {An invention is described that enables the quantitative simultaneous identification of the matrix materials in which fertile and fissile nuclides are embedded to be made along with the quantitative assay of the fertile and fissile materials. The invention also enables corrections for any absorption of neutrons by the matrix materials and by the measurement apparatus by the measurement of the prompt and delayed neutron flux emerging from a sample after the sample is interrogated by simultaneously applied neutrons and gamma radiation. High energy electrons are directed at a first target to produce gamma radiation. A second target receives the resulting pulsed gamma radiation and produces neutrons from the interaction with the gamma radiation. These neutrons are slowed by a moderator surrounding the sample and bathe the sample uniformly, generating second gamma radiation in the interaction. The gamma radiation is then resolved and quantitatively detected, providing a spectroscopic signature of the constituent elements contained in the matrix and in the materials within the vicinity of the sample. (LEW)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {8}
}