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Neutron and gamma-ray energy reconstruction for characterization of special nuclear material
Shaun D. Clarke,Michael C. Hamel,Angela Di fulvio,Sara A. Pozzi 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.6
Characterization of special nuclear material may be performed using energy spectroscopy of either theneutron or gamma-ray emissions from the sample. Gamma-ray spectroscopy can be performed relativelyeasily using high-resolution semiconductors such as high-purity germanium. Neutron spectroscopy, bycontrast, is a complex inverse problem. Here, results are presented for 252Cf and PuBe energy spectraunfolded using a single EJ309 organic scintillator; excellent agreement is observed with the referencespectra. Neutron energy spectroscopy is also possible using a two-plane detector array, whereby time-offlightkinematics can be used. With this system, energy spectra can also be obtained as a function ofposition. Spatial-dependent energy spectra are presented for neutron and gamma-ray sources that are inexcellent agreement with expectations.