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Excitons in scintil...
Excitons in scintillator materials: Optical properties and electron-energy loss spectra of NaI, LaBr₃, BaI₂, and SrI₂
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- Schleife, A. (author)
- University of Illinois
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- Zhang, Xiao (author)
- University of Illinois
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- Li, Qi (author)
- IBM Thomas J. Watson Research Center,University of Illinois
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- Erhart, Paul, 1978 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Åberg, Daniel (author)
- Lawrence Livermore National Laboratory
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University of Illinois IBM Thomas J Watson Research Center (creator_code:org_t)
- 2016-11-03
- 2017
- English.
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In: Journal of Materials Research. - : Springer Science and Business Media LLC. - 0884-2914 .- 2044-5326. ; 32:1, s. 56-63
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Abstract
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- Materials for scintillator radiation detectors need to fulfill a diverse set of requirements such as radiation hardness and highly specific response to incoming radiation, rendering them a target of current materials design efforts. Even though they are amenable to cutting-edge theoretical spectroscopy techniques, surprisingly many fundamental properties of scintillator materials are still unknown or not well explored. In this work, we use first-principles approaches to thoroughly study the optical properties of four scintillator materials: NaI, LaBr3, BaI2, and SrI2. By solving the Bethe-Salpeter equation for the optical polarization function we study the influence of excitonic effects on dielectric and electron-energy loss functions. This work sheds light into fundamental optical properties of these four scintillator materials and lays the ground-work for future work that is geared toward accurate modeling and computational materials design of advanced radiation detectors with unprecedented energy resolution. Copyright © Materials Research Society 2016.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- optical properties
- electron energy loss spectroscopy (EELS)NiAl
- electronic structure
Publication and Content Type
- art (subject category)
- ref (subject category)
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