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Luminescence and scintillation properties of advanced Lu3Al5O12:Pr3+ single crystal scintillators
Affiliation:1. Department of Physics, King Mongkut''s University of Technology, Thonburi, Bangkok 10140, Thailand;2. Institute of Physics, AS CR, Cukrovarnicka 10, 16253 Prague, Czech Republic;1. Laboratório de Qumica do Estado Sólido, Departamento de Qumica Fundamental – CCEN, Universidade Federal de Pernambuco, BR 101 s/n, 50670-901, Recife, PE, Brazil;2. Programa de Pós-graduacão em Ciência de Materiais – PPGMTR, CCEN, Universidade Federal de Pernambuco, BR 101 s/n, 50670-901, Recife, PE, Brazil;1. Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand;2. Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand;3. Department of Physics, Kyungpook National University, Daegu 702-701, Republic of Korea;1. Istituto Auxologico Italiano, IRCCS, Department of Cardiovascular, Neural and Metabolic Sciences, San Luca Hospital, Milan, Italy;2. Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy;1. Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, Japan;2. Hitachi Metals, Ltd, Japan;1. Department of Physics, Kyungpook National University, Daegu, 702-701, Republic of Korea;2. Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand;3. Center of Excellence in Glass Technology and Material Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand
Abstract:In this paper we present the luminescence and scintillation properties of Lu3Al5O12:Pr (LuAG:Pr) single crystals with Pr3+ concentration of 0.13 wt %, grown by the Czochralski method. The light yield and energy resolution were measured under 662 keV γ-ray excitation. The dominant emission band peaking at 310 nm with a shoulder at 370 nm was observed in the photoluminescence spectrum. High light yield of 24,500 ph/MeV and an energy resolution of 5.3 % were obtained for a 6 × 6 × 2 mm3 LuAG:Pr sample. Light yield dependence on sample height and shaping time was measured. The estimated photofraction in pulse height spectrum and total mass attenuation coefficient at 662 keV γ-rays were also determined and compared with the theoretical ones calculated using the WinXCom program.
Keywords:Energy resolution  Light yield  LuAG:Pr  Photofraction  Scintillation detectors
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