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http://dx.doi.org/10.1016/j.net.2017.06.005

Neutron and gamma-ray energy reconstruction for characterization of special nuclear material  

Clarke, Shaun D. (Department of Nuclear Engineering and Radiological Sciences, University of Michigan)
Hamel, Michael C. (Department of Nuclear Engineering and Radiological Sciences, University of Michigan)
Di fulvio, Angela (Department of Nuclear Engineering and Radiological Sciences, University of Michigan)
Pozzi, Sara A. (Department of Nuclear Engineering and Radiological Sciences, University of Michigan)
Publication Information
Nuclear Engineering and Technology / v.49, no.6, 2017 , pp. 1354-1357 More about this Journal
Abstract
Characterization of special nuclear material may be performed using energy spectroscopy of either the neutron or gamma-ray emissions from the sample. Gamma-ray spectroscopy can be performed relatively easily using high-resolution semiconductors such as high-purity germanium. Neutron spectroscopy, by contrast, is a complex inverse problem. Here, results are presented for $^{252}Cf$ and PuBe energy spectra unfolded using a single EJ309 organic scintillator; excellent agreement is observed with the reference spectra. Neutron energy spectroscopy is also possible using a two-plane detector array, whereby time-of-flight kinematics can be used. With this system, energy spectra can also be obtained as a function of position. Spatial-dependent energy spectra are presented for neutron and gamma-ray sources that are in excellent agreement with expectations.
Keywords
Neutron spectroscopy; Spectrum unfolding; Neutron imaging;
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