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

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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 252Cf 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.

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Clarke, S. D., Hamel, M. C., Di fulvio, A., & Pozzi, S. A. (2017). Neutron and gamma-ray energy reconstruction for characterization of special nuclear material. Nuclear Engineering and Technology, 49(6), 1354–1357. https://doi.org/10.1016/j.net.2017.06.005

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