18 October 2007 Investigation of CaF2:Eu scintillator for D-D neutron interrogation
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CaF2:Eu is an attractive radiation detection material because it is inert, non-hygroscopic, shock resistant, and can be less expensive than other radiation detection materials. A CaF2:Eu scintillation detector was constructed to identify whether energy dependent differences in (n,p) and (n,α) cross sections could be exploited to distinguish fission neutrons from D-D neutrons in an active interrogation system. Experimentally, the charged particles are difficult to distinguish from the significantly larger number of γ-rays produced in (n,γ) reactions. In addition, modeling results show that fission neutrons produce only slightly higher charged particle production rates than D-D neutrons. For charged particle production in CaF2:Eu to succeed in fission neutron detection, a superior γ-ray discrimination technique is required.
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Andrew D. Herr, Andrew D. Herr, Arlyn J. Antolak, Arlyn J. Antolak, Dan H. Morse, Dan H. Morse, Michael King, Michael King, Kristin Hertz, Kristin Hertz, Ka-Ngo Leung, Ka-Ngo Leung, Tak-Pui Lou, Tak-Pui Lou, "Investigation of CaF2:Eu scintillator for D-D neutron interrogation", Proc. SPIE 6707, Penetrating Radiation Systems and Applications VIII, 670711 (18 October 2007); doi: 10.1117/12.740823; https://doi.org/10.1117/12.740823

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