Topic
Scintillation
About: Scintillation is a research topic. Over the lifetime, 14022 publications have been published within this topic receiving 187694 citations.
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10 Nov 2002
TL;DR: In this article, a relatively new scintillator -LaBr/sub 3/:Ce for gamma-ray spectroscopy was reported, which was grown using the Bridgman process.
Abstract: In this paper, we report on a relatively new scintillator - LaBr/sub 3/:Ce for gamma-ray spectroscopy. Crystals of this scintillator have been grown using Bridgman process. This material when doped with cerium has high light output (/spl sim/60000 photons/MeV) and fast principal decay constant (/spl les/25 ns). Furthermore, it shows excellent energy resolution for /spl gamma/-ray detection. Energy resolution of 3.2% (FWHM) has been achieved for 662 keV photons (/sup 137/Cs source) at room temperature. High timing resolution (260 ps FWHM) has been recorded with LaBr/sub 3/:Ce-PMT and BaF/sub 2/-PMT detectors operating in coincidence mode using 511-keV positron annihilation /spl gamma/-ray pairs. Details of its scintillation properties, and variation of these properties with changing cerium concentration are reported. Potential applications of this material are also addressed.
181 citations
02 Nov 1996
TL;DR: In this article, Nayar et al. use a Monte Carlo simulation to deal with the interaction of scintillation photons with dielectric surfaces, using the standard deviation of the surface slope as a model parameter that can be extracted from simple measurements.
Abstract: DETECT is a Monte Carlo simulation capable of realistically modeling the optics of scintillation detectors. A limitation of this widely used program is its lack of realism and flexibility in dealing with the surface finish and reflector coating of photon counters. To address these limitations, we initiated the implementation into DETECT of a more physical model to treat the interactions of scintillation photons with dielectric surfaces. Inspired from the initial work of Nayar et al. (1991), this approach has the particular advantage of unifying, into a single parametrization, models that usually apply over a very limited range of surface roughness values. This flexibility is ensured by using the standard deviation of the surface slope as a model parameter that can be extracted from simple measurements.
181 citations
TL;DR: It is demonstrated, through numerical simulations, that an appropriately chosen nonuniformly polarized coherent optical field can have appreciably smaller scintillation than comparable beams of uniform polarization.
Abstract: We demonstrate, through numerical simulations, that an appropriately chosen nonuniformly polarized coherent optical field can have appreciably smaller scintillation than comparable beams of uniform polarization. This results from the fact that a nonuniformly polarized field acts as an effective two-mode partially coherent field. The results described here are of direct relevance to the development of free-space optical communication systems.
180 citations
TL;DR: Two applications for plastic scintillation detectors in clinical radiotherapy are presented: stereotactic radiosurgery dosimetry and the quality assurance of Co 60 and high-energy therapy beams.
179 citations
TL;DR: In this article, a phenomenological model involving distortion of the band structure is proposed to explain the results of kinetic measurements of a highly dense transparent YAG: Ce-ceramic.
177 citations