Pulsed Photofission Delayed Gamma Ray Detection for Nuclear Material Identification

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Innovative systems with increased sensitivity and resolution are in great demand to detect diversion and to prevent misuse in support of nuclear materials management for the U.S. fuel cycle. Nuclear fission is the most important multiplicative process involved in non-destructive active interrogation. This process produces the most easily recognizable signature for nuclear materials. High-energy gamma rays can also excite a nucleus and cause fission through a process known as photofission. After photofission reactions, delayed signals are easily distinguishable from the interrogating radiation. Linac-based, advanced inspection techniques utilizing the fission signals after photofission have been extensively studied for homeland security applications. ... continued below

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Kavouras, John; Wen, Xianfei; Norman, Daren R.; Nakazawa, Dante R. & Yang, Haori November 1, 2012.

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Innovative systems with increased sensitivity and resolution are in great demand to detect diversion and to prevent misuse in support of nuclear materials management for the U.S. fuel cycle. Nuclear fission is the most important multiplicative process involved in non-destructive active interrogation. This process produces the most easily recognizable signature for nuclear materials. High-energy gamma rays can also excite a nucleus and cause fission through a process known as photofission. After photofission reactions, delayed signals are easily distinguishable from the interrogating radiation. Linac-based, advanced inspection techniques utilizing the fission signals after photofission have been extensively studied for homeland security applications. Previous research also showed that a unique delayed gamma ray energy spectrum exists for each fissionable isotope. Isotopic composition measurement methods based on delayed gamma ray spectroscopy will be the primary focus of this work.

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  • 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (2012 NSS/MIC),Anaheim California,10/29/2012,11/03/2012

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  • Report No.: INL/CON-12-25837
  • Grant Number: DE-AC07-05ID14517
  • Office of Scientific & Technical Information Report Number: 1070139
  • Archival Resource Key: ark:/67531/metadc834002

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Office of Scientific & Technical Information Technical Reports

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  • November 1, 2012

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  • May 19, 2016, 9:45 a.m.

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  • June 20, 2016, 3:49 p.m.

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Kavouras, John; Wen, Xianfei; Norman, Daren R.; Nakazawa, Dante R. & Yang, Haori. Pulsed Photofission Delayed Gamma Ray Detection for Nuclear Material Identification, article, November 1, 2012; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc834002/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.