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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Papers
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TL;DR: In this paper, a new inorganic scintillator, Lu2Si2O7:Ce3+ (LPS), was proposed for medical imaging, which can be readily pulled from the melt.
Abstract: Cerium doped lutetium pyrosilicate Lu2Si2O7:Ce3+ (LPS), a new inorganic scintillator, displays particularly promising performance. This material can be readily pulled from the melt. A high light output (average value: 26 300 ph MeV−1), a relatively good energy resolution (9%) and a fast decay time (38 ns) without afterglow make this new scintillator very attractive, in particular for medical imaging. Optical characterizations and scintillation properties of LPS:Ce large single crystals are presented, including timing properties and study of the scintillation yields as a function of incident energy.
147 citations
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TL;DR: In this article, the authors examined what is expected in respect of the interstellar scintillation of very compact, extragalactic radio sources and found that large-amplitude, rapid, variability is predicted at commonly observed radio frequencies (1-20 GHz) over the vast majority of the sky.
Abstract: The recent discovery of radio variability of a quasar on short time-scales (hours) prompts us to examine what is expected in respect of the interstellar scintillation of very compact, extragalactic radio sources. We find that large-amplitude, rapid, variability is predicted at commonly observed radio frequencies (1–20 GHz) over the vast majority of the extragalactic sky. As a guide to assist observers in understanding their data, we demonstrate simple techniques for predicting the effects of interstellar scintillation on any extragalactic source.
146 citations
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144 citations
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TL;DR: This work presents an analytical-numerical hybrid technique that provides good information on the variance in optical irradiance with an important saving of time and computational resources.
Abstract: In an optical communication link between an optical ground station and a geostationary satellite the main problems appear in the uplink and are due to beam wander and to scintillation Reliable methods for modeling both effects simultaneously are needed to provide an accurate tool with which the robustness of the communication channel can be tested Numerical tools, especially the split-step method (also referred to as the fast-Fourier-transform beam propagation method), have demonstrated their ability to deal with problems of optical propagation during atmospheric turbulence However, obtaining statistically significant results with this technique is computationally intensive We present an analytical-numerical hybrid technique that provides good information on the variance in optical irradiance with an important saving of time and computational resources
144 citations
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144 citations