Recent developments in plastic scintillators with pulse shape discrimination

Zaitseva, Natalia; Glenn, A.; Mabe, Andrew N.; Carman, M. Leslie; Hurlbut, C.; Inman, Jenifer; Payne, Stephen A.

doi:10.1016/j.nima.2018.01.093

Cited by 113 publications

(54 citation statements)

References 20 publications

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“…It should be noted that the pixelated array was manufactured in August 2017, before the latest plastic scintillator EJ-276 was released by Eljen Technology. Based on the recently published work of characterising EJ-276 (replacement for EJ-299-33/34), it is expected that similar array built with this new material would signicantly improve PSD performance of the system tested in this paper [9].…”

Section: Discussionmentioning

confidence: 99%

“…In recent years signicance of the organic solid scintillators has been steadily growing, owing to their continuously improving PSD performance and less hazardous characteristics. Even though PSD performance of plastic scintillators was deemed inferior to liquid counterparts in the past [8], recent ndings present a comparable performance of the latest organic plastic scintillator (EJ-276) and one of the most widely used liquid detectors EJ-309 [9].…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of a pixelated plastic scintillator for a coded aperture neutron/gamma imaging system

Cieślak

Gamage

2018

2018 IEEE Nuclear Science Symposium and Medical Imaging Conference Proceedings (NSS/MIC)

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This paper experimentally investigates, the suitability of an organic pixelated plastic scintillator for a coded aperture neutron/gamma imaging system. The scintillator used in this study has been designed as a small scaled detector with an individual pixel size of 2.8 mm x 2.8 mm x 15 mm. Individual blocks of the scintillator have been separated from one another with ESR T M reector foil to provide over 70% of optical isolation between pixels. Individual scintillator cells are arranged into 13x13 array with overall dimension of 39.52 mm x 39.52 mm. In this study the scintillator was attached to a single channel photomultiplier tube to assess its pulse shape discrimination capabilities. Initially the scintillator was irradiated with 137 Cs gamma-ray source, and gamma-ray pulses were benchmarked with respect to a mathematical model. The detector was then irradiated with a spontaneous ssion source, 252 Cf, and preliminary results suggested good pulse shape discrimination potential of the scintillator. It is believed, that it is the rst time a small scale pixelated organic plastic scintillator has been tested in context of PSD capabilities for a coded aperture neutron/gamma imaging system.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterisation of a pixelated plastic scintillator for a coded aperture neutron/gamma imaging system

Cieślak

Gamage

2018

2018 IEEE Nuclear Science Symposium and Medical Imaging Conference Proceedings (NSS/MIC)

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“…When a viable n-γ discriminating plastic scintillator, Eljen 299 (EJ-299) [10], was first developed [11], the material was not hard enough to facilitate machining and had to be cast directly into the final detector geometry. However, recent improvements to the EJ-299 polymer matrix increased physical stability and pulse-shape discrimination (PSD) capabilities [12]. This new plastic scintillator, Eljen 276 (EJ-276), has n-γ discrimination capabilities comparable to liquid scintillators and is now firm enough for machining of segments with appropriate thickness and geometry to construct a high-resolution neutron time-of-flight detector.…”

Section: Detector Requirementsmentioning

confidence: 99%

“…The n-γ response mechanism for EJ-276 is accurately described in Ref. [12]. The two pre-covered EJ-276 bars from Agile Technologies, Inc. (ESR and Lumirror ™ ) and a third EJ-276 bar wrapped with PTFE were tested to measure the effect of different surface reflectors on the quality of the PSD.…”

Section: Neutron-gamma Discriminationmentioning

confidence: 99%

Conceptual design and first results for a neutron detector with interaction localization capabilities

Heideman

Pérez–Loureiro

Grzywacz

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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A new high-precision detector for studying neutrons from beta-delayed neutron emission and direct reaction studies is proposed. The Neutron dEtector with Xn Tracking (NEXT) array is designed to maintain high intrinsic neutron detection efficiency while reducing uncertainties in neutron energy measurements. A single NEXT module is composed of thin segments of plastic scintillator, each optically separated, capable of neutron-gamma discrimination. Each segmented module is coupled to position sensitive photodetectors enabling the high-precision determination of neutron time of arrival and interaction position within the active volume. A design study has been conducted based on simulations and experimental tests leading to the construction of prototype units. First results from measurements using a 252 Cf neutron source and accelerator-produced monoenergetic neutrons are presented.to observe beta-delayed neutron emitters with improved precision. These improvements will also be applicable to proton transfer reactions which probe discrete states of exotic nuclei.NEXT has also been designed to incorporate neutron-gamma (n-γ) discrimination to improve background rejection. Prevalent gamma-ray backgrounds common in decay and reaction measurements can be reduced significantly in neutron spectra, further improving neutron energy determinations [5]. Proof-of-principle tests for the NEXT design will be described along with results from the first neutron measurements. Detector DesignA neutron time-of-flight (ToF) detector determines neutron kinetic energies, E, by measuring the

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“…To meet the three stated requirements, substantial research was performed using stilbene organic scintillators coupled to silicon photomultipliers (SiPMs) to develop a NSC. Stilbene has high lightoutput relative to other hydrogenous scintillators, which could be used for the active volume of a NSC, and can achieve pulse shape discrimination (PSD) at lower energies compared to other hydrogenous scintillators 15,16 . SiPMs have recently become a viable choice as a photo-detector for scintillation light 17 .…”

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confidence: 99%

Imaging Special Nuclear Material using a Handheld Dual Particle Imager

Steinberger

Ruch

Giha

et al. 2020

Sci Rep

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A compact radiation imaging system capable of detecting, localizing, and characterizing special nuclear material (e.g. highly-enriched uranium, plutonium…) would be useful for national security missions involving inspection, emergency response, or war-fighters. Previously-designed radiation imaging systems have been large and bulky with significant portions of volume occupied by photomultiplier tubes (pMts). the prototype imaging system presented here uses silicon photomultipliers (SipMs) in place of pMts because SipMs are much more compact and operate at low power and voltage. the SipMs are coupled to the ends of eight stilbene organic scintillators, which have an overall volume of 5.74 × 5.74 × 7.11 cm 3. the prototype dual-particle imager's capabilities were evaluated by performing measurements with a 252 Cf source, a sphere of 4.5 kg of alpha-phase weapons-grade plutonium known as the BeRP ball, a 6 kg sphere of neptunium, and a canister of 3.4 kg of plutonium oxide (7% 240 Pu and 93% 239 Pu). these measurements demonstrate neutron spectroscopic capabilities, a neutron image resolution for a Watt spectrum of 9.65 ± 0.94° in the azimuthal direction and 22.59 ± 5.81° in the altitude direction, imaging of gamma rays using organic scintillators, and imaging of multiple sources in the same field of view.

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Recent developments in plastic scintillators with pulse shape discrimination

Cited by 113 publications

References 20 publications

Characterisation of a pixelated plastic scintillator for a coded aperture neutron/gamma imaging system

Characterisation of a pixelated plastic scintillator for a coded aperture neutron/gamma imaging system

Conceptual design and first results for a neutron detector with interaction localization capabilities

Imaging Special Nuclear Material using a Handheld Dual Particle Imager

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