Dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources

Barty, Christopher P.J.

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Title: Dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources

Abstract

A dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources includes a detector arrangement consists of three detectors downstream from the object under observation. The latter detector, which operates as a beam monitor, is an integrating detector that monitors the total beam power arriving at its surface. The first detector and the middle detector each include an integrating detector surrounding a foil. The foils of these two detectors are made of the same atomic material, but each foil is a different isotope, e.g., the first foil may comprise U235 and second foil may comprise U238. The integrating detectors surrounding these pieces of foil measure the total power scattered from the foil and can be similar in composition to the final beam monitor. Non-resonant photons will, after calibration, scatter equally from both foils.

Inventors:: Barty, Christopher P.J.

Issue Date:: Tue Feb 05 00:00:00 EST 2013

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1083213

Patent Number(s):: 8369480

Application Number:: 12/506,639

Assignee:: Lawrence Livermore National Security, LLC (Livermore, CA)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N2223/1013 - gamma
G01N23/04 - and forming images of the material

G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
G01V5/0008 - {Detecting hidden objects, e.g. weapons, explosives

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DOE Contract Number:: AC52-07NA27344

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats


                    Barty, Christopher P.J. Dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources.  United States: N. p., 2013. 
        Web.

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                    Barty, Christopher P.J. Dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources.  United States.

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                    Barty, Christopher P.J. Tue .  
        "Dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources".  United States.  https://www.osti.gov/servlets/purl/1083213.

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@article{osti_1083213,

  title        = {Dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources},

  author       = {Barty, Christopher P.J.},

  abstractNote = {A dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources includes a detector arrangement consists of three detectors downstream from the object under observation. The latter detector, which operates as a beam monitor, is an integrating detector that monitors the total beam power arriving at its surface. The first detector and the middle detector each include an integrating detector surrounding a foil. The foils of these two detectors are made of the same atomic material, but each foil is a different isotope, e.g., the first foil may comprise U235 and second foil may comprise U238. The integrating detectors surrounding these pieces of foil measure the total power scattered from the foil and can be similar in composition to the final beam monitor. Non-resonant photons will, after calibration, scatter equally from both foils.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Feb 05 00:00:00 EST 2013},

  month        = {Tue Feb 05 00:00:00 EST 2013}

}

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