Journal ArticleDOI
EJ-309 pulse shape discrimination performance with a high gamma-ray-to-neutron ratio and low threshold
TLDR
In this paper, the EJ-309 scintillator was used to measure neutrons in the presence of high gamma-ray fluence, which is a challenge with multi-particle detectors.Abstract:
Measuring neutrons in the presence of high gamma-ray fluence is a challenge with multi-particle detectors. Organic liquid scintillators such as the EJ-309 are capable of accurate pulse-shape discrimination (PSD) but the chance for particle misclassification is not negligible for some applications. By varying the distance from an EJ-309 scintillator to a strong-gamma-ray source and keeping a weak-neutron source at a fixed position, various gamma-to-neutron ratios can be measured and PSD performance can be quantified. Comparing neutron pulse-height distributions allows for pulse-height specific PSD evaluation, and quantification and visualization of deviation from 252Cf alone. Even with the addition of the misclassified gamma-rays, the PSD is effective in separating particles so that neutron count rate can be predicted with less than 10% error up to a gamma-to-neutron ratio of almost 650. For applications which can afford a reduction in neutron detection efficiency, PSD can be sufficiently effective in discriminating particles to measure a weak neutron source in a high gamma-ray background.read more
Citations
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Journal ArticleDOI
Neutron detection in a high-gamma field using solution-grown stilbene
TL;DR: In this article, a solution-based technique for growing large-volume stilbene scintillators was developed in 2013; crystals up to diameters of 10 cm, or larger, have been grown while preserving excellent pulse shape discrimination (PSD) properties.
Journal ArticleDOI
Plutonium measurements with a fast-neutron multiplicity counter for nuclear safeguards applications
J. L. Dolan,Marek Flaska,Alexis Poitrasson-Rivière,Andreas Enqvist,Paolo Peerani,David L. Chichester,Sara A. Pozzi +6 more
TL;DR: In this article, a fast-neutron multiplicity counter developed at the University of Michigan was used to detect neutrons in Ispra, Italy, where the measurements allowed the assessment of the system's photon discrimination abilities, efficiency when measuring neutron multiplicity, ability to characterize 240Pueff mass, and performance relative to a currently deployed neutron coincidence counter.
Journal ArticleDOI
Light collection and pulse-shape discrimination in elongated scintillator cells for the PROSPECT reactor antineutrino experiment
J. Ashenfelter,B. Balantekin,H. R. Band,G. Barclay,C.D. Bass,D. Berish,Nathaniel Bowden,A. Bowes,J. P. Brodsky,C. D. Bryan,J. J. Cherwinka,Rui-Lin Chu,Rui-Lin Chu,T. Classen,K. Commeford,D. Davee,D. J. Dean,G. Deichert,M. V. Diwan,M. J. Dolinski,J. Dolph,D. A. Dwyer,J. K. Gaison,A. Galindo-Uribarri,A. Galindo-Uribarri,K. Gilje,A. Glenn,B. W. Goddard,M. P. Green,Ke Han,S. Hans,K. M. Heeger,B. Heffron,B. Heffron,D. E. Jaffe,T. J. Langford,B. R. Littlejohn,D. A. Martinez Caicedo,R. D. McKeown,M. P. Mendenhall,P. E. Mueller,Hans P. Mumm,Jim Napolitano,R. Neilson,D. Norcini,Dmitry A. Pushin,Xin Qian,E. Romero,E. Romero,R. Rosero,L. Saldaña,B. Seilhan,R. Sharma,Steven Sheets,N.T. Stemen,P. T. Surukuchi,R. L. Varner,B. Viren,Wei Wang,B. R. White,C. White,J. Wilhelmi,Christopher B. Williams,T. Wise,H. Yao,Minfang Yeh,Y-R Yen,G. Zangakis,Chao Zhang,X. Zhang +69 more
TL;DR: Ashenfelter et al. as mentioned in this paper constructed a meter-long, 23-liter EJ-309 liquid scintillator detector for the PROSPECT reactor antineutrino experiment.
Journal ArticleDOI
Organic liquid scintillation detectors for on-the-fly neutron/gamma alarming and radionuclide identification in a pedestrian radiation portal monitor
Marc G. Paff,Marc L. Ruch,Alexis Poitrasson-Rivière,Athena Sagadevan,Shaun D. Clarke,Sara A. Pozzi +5 more
TL;DR: In this paper, the authors presented new experimental results from a radiation portal monitor based on the use of organic liquid scintillators, which consistently alarmed on a variety of gamma-ray sources travelling at 1.2m/s at a 70cm source to detector distance.
Journal ArticleDOI
Spectroscopic neutron radiography for a cargo scanning system
TL;DR: In this article, the authors used monoenergetic gamma rays from low energy nuclear reactions, such as 11B(d,nγ)12C, to perform radiographic analysis of shipping containers.
References
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Book
Radiation detection and measurement
TL;DR: In this paper, the authors present a detailed analysis of the effect of different types of detectors on the performance of the detection of neutrons and their effect on the detection efficiency and error prediction.
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
Pulse-height distributions of neutron and gamma rays from plutonium-oxide samples
TL;DR: In this article, the authors present new results on neutron and gamma-ray pulse-height distributions (PHDs) measured with liquid scintillators from five plutonium-oxide samples of varying mass and burnup and a 252 Cf isotopic source.
Journal ArticleDOI
Neutron detection in a high gamma-ray background with EJ-301 and EJ-309 liquid scintillators
TL;DR: In this article, a fast liquid scintillator EJ-309 was used to detect a weak neutron source in a high gamma-ray background with a dose rate of 100μSv/h.
Journal ArticleDOI
Studies of neutron–γ pulse shape discrimination in EJ-309 liquid scintillator using charge integration method
TL;DR: In this article, the effect of distortions in pulse shape caused by 13.7m long cables necessary for remote operations have been examined in liquid scintillator EJ-309 cells coupled with 3-in. photomultiplier tubes.