1 September 2005 Active interrogation using low-energy nuclear reactions
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High-energy photons and neutrons can be used to interrogate for heavily shielded fissile materials inside sealed cargo containers by detecting their prompt and/or delayed fission signatures. The FIND (Fissmat Inspection for Nuclear Detection) active interrogation system is based on a dual neutron+gamma source that uses low-energy (< 500 keV) proton- or deuteron-induced nuclear reactions to produce high intensities of mono-energetic gamma rays and/or neutrons. The source can be operated in either pulsed (e.g., to detect delayed photofission neutrons and gammas) or continuous (e.g., detecting prompt fission signatures) modes. For the gamma-rays, the source target can be segmented to incorporate different (p,γ) isotopes for producing gamma-rays at selective energies, thereby improving the probability of detection. The design parameters for the FIND system are discussed and preliminary accelerator-based measurements of gamma and neutron yields, background levels, and fission signals for several target materials under consideration are presented.
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Arlyn Antolak, Arlyn Antolak, Barney Doyle, Barney Doyle, Ka-Ngo Leung, Ka-Ngo Leung, Daniel Morse, Daniel Morse, Paula Provencio, Paula Provencio, } "Active interrogation using low-energy nuclear reactions", Proc. SPIE 5923, Penetrating Radiation Systems and Applications VII, 592303 (1 September 2005); doi: 10.1117/12.624973; https://doi.org/10.1117/12.624973

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