Neutron measurements can be used to distinguish plutonium in metal or oxide form, a capability that is of great interest in nuclear nonproliferation, treaty verification, and other applications. This paper describes measurements performed on well-characterized samples of
plutonium oxide and plutonium metal using the pulse-shape-discrimination-capable plastic scintillator EJ-299-33. Results are compared to those obtained with a same-sized detector cell using the liquid scintillator EJ-309. The same optimized, digital pulse shape discrimination technique is applied to both detectors and the neutron pulse height distributions are compared. Results show that the EJ-299-33 plastics can be successfully used for plutonium measurements, where the gamma ray to neutron detection ratio is much higher than for typical radioactive sources. Results also show that EJ-299-33 detectors can be used to characterize plutonium samples, specifically to discriminate between plutonium metal and oxide.
POZZI Sara;
BOURNE Mark;
DOLAN Jennifer;
POLACK K;
LAWRENCE C.;
FLASKA M.;
CLARKE Shaun D.;
TOMANIN Alice;
PEERANI Paolo;
2014-12-11
ELSEVIER SCIENCE BV
JRC90450
0168-9002,
http://www.sciencedirect.com/science/article/pii/S016890021400922X,
https://publications.jrc.ec.europa.eu/repository/handle/JRC90450,
10.1016/j.nima.2014.08.002,
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