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Comparative study of Tm-doped and Tm-Sc co-doped Lu3Al5O12 scintillator
Affiliation:1. Chiyoda Technol Corporation, 1-7-12, Yushima, Bunkyo-ku, Tokyo 113-8681, Japan;2. Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu, Kitakyushu, Fukuoka 808-0196, Japan;1. Institute for Scintillation Materials NAS of Ukraine, 60, Lenin Av., 61001 Kharkiv, Ukraine;2. SSI “Institute for Single Crystals”, NAS of Ukraine, 60, Lenin Av., 61001 Kharkiv, Ukraine;3. Institute for Nuclear Problems, 11, Bobruiskaya Str. 11, 220030 Minsk, Belarus;1. Institute for Scintillation Materials NAS of Ukraine, 60, Nauky ave., 61072 Kharkiv, Ukraine;2. Institut Lumière Matière UMR 5306, Université Lyon, Université Claude Bernard Lyon 1, CNRS, F-69100 Villeurbanne, France;1. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, A.P., India;2. Institute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu 50411, Estonia;3. College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;4. Institute of Physics, Jan Dlugosz University, Al Armii Krajowej 13/15, Czestochowa PL-42200, Poland;5. Department of Physics, 13N, University of Aveiro, 3810-193 Aveiro, Portugal;6. Institute of Physics, J. Dlugosz University, Ul. Armii Krajowej 13/15, 42-201 Czestochowa, Poland;1. Department of Applied Mathematics, Donghua University, Shanghai 201620, China;2. College of Information Science and Technology, Donghua University, Shanghai 201620, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:The crystals of Tm doped and Tm-Sc co-doped Lu3Al5O12 (LuAG) grown by the floating zone (FZ) method were examined for their optical and scintillation properties. In transmittance spectra, strong absorption lines due to Tm3+ 4f–4f transitions were observed. X-ray excited radioluminescence spectra were measured and broad and sharp emission peaks were detected. The former one was attributed to Sc3+ and the latter one was due to Tm3+ 4f–4f transitions. Scintillation yield enhancement due to Sc co-doping was observed by means of 137Cs pulse height spectra. Scintillation decay times were several tens of μs under pulse X-ray excitation.
Keywords:Scintillator  Single crystal
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