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Observed light yield of scintillation pixels: Extending the two-ray model
Affiliation:1. Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga LV-1063, Latvia;2. Institut Laue-Langevin, 71, avenue des Martyrs, 38000 Grenoble, France;3. Institut für Materialwissenschaft, Technische Universität Darmstadt, Petersenstrasse 23, 64287 Darmstadt, Germany;4. Fraunhofer-Institut für Silicatforschung ISC, Brentanostr. 2, 63755 Alzenau, Germany;5. The Bragg Institute, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia;1. Lviv Polytechnic National University, 12 Bandera Str., 79013 Lviv, Ukraine;2. Physics Faculty of Opole University of Technology, 75 Ozimska Str., 45370 Opole, Poland;3. Vlokh Institute of Physical Optics, 23 Dragomanov Str., 79005 Lviv, Ukraine;4. Institute of Physics of Jan Dlugosz University, 13/15 al. Armii Krajowej, 42201 Czestochowa, Poland;5. Ivan Franko National University of Lviv, Department of Electronics, 107 Tarnavskogo Str., 79017 Lviv, Ukraine;1. Department of Physics, King Mongkut''s University of Technology Thonburi, Bangkok 10140, Thailand;2. National Centre for Nuclear Research, A. Soltana 7, Swierk-Otwock PL 05-400, Poland;3. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;4. New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan;5. Institute of Physics, ASCR, Cukrovarnicka 10, 16253 Prague, Czech Republic;1. Aristotle University of Thessaloniki, Physics Department, Nuclear Physics and Elementary Particles Physics Section, 54124, Thessaloniki, Greece;2. McDaniel College, Physics Department, Westminster, MD 21157, USA;1. School of Physics, Northeast Normal University, and Key Laboratory for UV Light-Emitting Materials and Technology of the Ministry of Education, Changchun 130024, China;2. Department of Physics, Georgia Southern University, Statesboro, GA 30460-8031, USA;1. Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan;2. School of Biomedical Engineering, Korea University, Seoul, South Korea;3. Hitachi Chemical, Ibaraki, Japan
Abstract:In this paper we propose an extended, two dimensional model describing the propagation of scintillation photons inside a cuboid crystal until they reach a PMT window. In the simplest approach the model considers two main reasons for light losses: standard absorption obeying the classical Lambert–Beer law and non-ideal reflectivity of the “mummy” covering formed by several layers of Teflon tape wrapping the sample. Results of the model calculations are juxtaposed with experimental data as well as with predictions of an earlier, one dimensional model.
Keywords:Scintillator  Scintillation yield  Light propagation  Absorption  Reflection
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