Plutonium metal vs. oxide determination with the pulse-shape-discrimination-capable plastic scintillator EJ-299-33
Sara A. Pozzi,M.M. Bourne,J. L. Dolan,J. Kyle Polack,C.C. Lawrence,Marek Flaska,Shaun D. Clarke,Alice Tomanin,Paolo Peerani +8 more
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TLDR
In this paper, the same optimized, digital pulse shape discrimination technique is applied to both detectors and the neutron pulse height distributions are compared, and the results show that the EJ-299-33 detectors can be successfully used for plutonium measurements, where the gamma ray to neutron detection ratio is much higher than for typical radioactive sources.Abstract:
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.read more
Citations
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Journal ArticleDOI
An algorithm for charge-integration, pulse-shape discrimination and estimation of neutron/photon misclassification in organic scintillators
J.K. Polack,Marek Flaska,Andreas Enqvist,Andreas Enqvist,Charles Sosa,C.C. Lawrence,Sara A. Pozzi +6 more
TL;DR: In this article, a novel algorithm was developed for automatically performing charge-integration pulse shape discrimination in a consistent and repeatable manner, which is able to estimate the photon and neutron misclassification corresponding to the calculated discrimination parameters, and is capable of doing so using only the information measured by a single organic scintillator.
Journal ArticleDOI
Evaluation of neutron light output response functions in EJ-309 organic scintillators
TL;DR: In this paper, the authors used the MCNPX-PoliMi simulation of an EJ-309 detector response to fast neutrons from a 252 Cf spontaneous fission source.
Journal ArticleDOI
A compact neutron scatter camera for field deployment.
TL;DR: It is demonstrated how the very compact battery operable neutron scatter camera provides neutron spectra that can distinguish plutonium metal from plutonium oxide sources, in addition to the easier task of distinguishing AmBe from fission sources.
Journal ArticleDOI
A novel detector assembly for detecting thermal neutrons, fast neutrons and gamma rays
D. Cester,Marcello Lunardon,Sandra Moretto,G. Nebbia,Felix Pino,L. Sajo-Bohus,L. Sajo-Bohus,Luca Stevanato,I. Bonesso,F. Turato +9 more
TL;DR: In this paper, a composite detector was developed by combining two different commercial scintillators, which has the capability to detect gamma rays as well as thermal and fast neutrons; the signal discrimination between the three types is performed on-line by means of waveform digitizers and PSD algorithms.
Journal ArticleDOI
Neutron angular distribution in plutonium-240 spontaneous fission
TL;DR: In this paper, a liquid organic scintillation detector array was used with pulse shape discrimination techniques to produce neutron-neutron cross-correlation time distributions and angular distributions from spontaneous fission in a 252 Cf, a 0.84 g 240 Pu eff metal, and a 1.63 ǫg 240 P eff metal sample.
References
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ENDF/B-VII.0: Next Generation Evaluated Nuclear Data Library for Nuclear Science and Technology
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TL;DR: The ENDF/B-VII.0 as discussed by the authors file contains data primarily for reactions with incident neutrons, protons, and photons on almost 400 isotopes, based on experimental data and theory predictions.
Journal ArticleDOI
Plastic scintillators with efficient neutron/gamma pulse shape discrimination
Natalia Zaitseva,Benjamin L. Rupert,Iwona PaweŁczak,A. Glenn,H. Paul Martinez,Leslie Carman,Michelle Faust,Nerine J. Cherepy,Stephen A. Payne +8 more
TL;DR: In this paper, a possibility of manufacturing plastic scintillators with efficient neutron/gamma pulse shape discrimination (PSD) was demonstrated using a system of a polyvinyltoluene (PVT) polymer matrix loaded with a scintilling dye, 2,5-diphenyloxazole (PPO).
Journal ArticleDOI
Pulse shape discrimination in the plastic scintillator EJ-299-33
TL;DR: In this article, the authors present PSD parameters and neutron time-of-flight from Cf-252 using a 5.08-cm diameter by 5.8-cm thick sample of PSD-capable plastic scintillator EJ-299-33.
Journal ArticleDOI
Identification of shielded neutron sources with the liquid scintillator BC-501A using a digital pulse shape discrimination method
Marek Flaska,Sara A. Pozzi +1 more
TL;DR: In this paper, the authors presented a new application of an existing technique, which can be used for neutron source identification by direct analysis of the pulse height spectrum, i.e., without resorting to energy spectrum unfolding.
Journal ArticleDOI
Experimental tests of the new plastic scintillator with pulse shape discrimination capabilities EJ-299-33
TL;DR: In this article, the prototype of a new plastic scintillator material (EJ-299-33) engineered for gamma-neutron discrimination was studied, and the results obtained with the new plastic material suggest its possible use in basic research (time-of-flight measurements) as well as in Homeland Security applications (NEutron/gamma monitoring device).