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Scintillation

About: Scintillation is a research topic. Over the lifetime, 14022 publications have been published within this topic receiving 187694 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a cross-linked polydimethyl-co-diphenylsiloxane with different molar percentages of phenyl units was synthesized for high light yield.
Abstract: Polysiloxane based scintillators with high light yield have been synthesized. The polymer consists in cross-linked polydimethyl-co-diphenylsiloxane with different molar percentages of phenyl units. 2,5-diphenyl oxazole (PPO) and 2,5-bis(5-ter-butyl-2-benzoxazolyl)thiophene (BBOT) have been dispersed in the polymer as dopants. The energy transfer and scintillation capabilities have been investigated, for two different amounts of phenyl groups in the polymer network and for different concentrations of dye molecules, by means of fluorescence spectroscopy, ion beam induced luminescence (IBIL) and scintillation yield measurements with ? particles from an 241Am source. The luminescence features and the scintillation yields have been correlated to the composition of the scintillators.

52 citations

Journal ArticleDOI
TL;DR: In this article, an optimized light readout system for LaBr3 was proposed for detection of gamma-rays up to 15 µmV using an under-biased photomultiplier tube (PMT).
Abstract: Lanthanum bromide scintillation detectors produce very high light outputs (∼60,000 ph/MeV) within a very short decay time (typically ∼20 ns) which means that high instantaneous currents can be generated in the photocathode and dynode chain of the photomultiplier tube (PMT) used for the scintillation readout. The net result is that signal saturation can occur long before the recommended PMT biasing conditions can be reached. In search of an optimized light readout system for LaBr3, we have tested and compared two different PMT configurations for detection of gamma-rays up to 15 MeV. This range was chosen as being appropriate for gamma-ray remote sensing and medium energy nuclear physics applications. The experiments were conducted at two facilities: the Laboratori Nazionali del Sud (LNS) in Catania, Italy [1] and the High Intensity Gamma-ray Source (HIγS) at Triangle University Nuclear Laboratory, in Durham, North Carolina, USA [2] . The PMT configurations we have tested are (1) a standard dynode chain operated under-biased; (2) a 4-stage reduced chain operated at nominal inter-dynode bias. The results are that shortening the number of active stages, as in configuration (2), has advantages in preserving energy resolution and avoiding PMT saturation over a large energy range. However, the use of an under-biased PMT, configuration (1), can still be considered a satisfactory solution, at least in the case of PMTs manufactured by Photonis. The results of this study will be used in support of the Mercury Gamma-ray and Neutron Spectrometer (MGNS) on board of BepiColombo, the joint ESA/JAXA mission to Mercury, scheduled for launch in 2014.

52 citations

Patent
07 May 2008
TL;DR: In this paper, a directional neutron detector consisting of very thin plastic scintillation fibers and optically coupled to a photo-sensor array is estimated from the sequence of fibers traversed by the scattered protons and energy deposited in each one of them.
Abstract: A directional neutron detector consisting of very thin plastic scintillation fibers and optically coupled to a photo-sensor array, where the directionality of Neutrons is estimated from the sequence of fibers traversed by the scattered protons and energy deposited in each one of them. Several fabrication methods of the large thin fiber arrays are described.

52 citations

Journal ArticleDOI
TL;DR: In this paper, the authors explored the possibility of using cerium-doped dense oxide glasses as dense scintillator for medical imaging application and concluded that trivalent ceriumdoped oxide glass scintillation with low cost and availability in large scale and good chemical durability might become one of the promising candidates of cerium doped dense glass for medical image application.

52 citations

Journal ArticleDOI
TL;DR: Efforts to improve the achievable spatial resolution in neutron imaging by centroiding the scintillation light from gadolinium oxysulfide scintillators are reported on, resulting in an event-based imaging detector with spatial resolution of about 2 μm.
Abstract: We report on efforts to improve the achievable spatial resolution in neutron imaging by centroiding the scintillation light from gadolinium oxysulfide scintillators. The current state-of-the-art neutron imaging spatial resolution is about 10 μm, and many applications of neutron imaging would benefit from at least an order of magnitude improvement in the spatial resolution. The detector scheme that we have developed magnifies the scintillation light from a gadolinium oxysulfide scintillator, calculates the center of mass of the scintillation event, resulting in an event-based imaging detector with spatial resolution of about 2 μm.

52 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023429
2022972
2021405
2020521
2019561
2018566