Eu and Rb co-doped LiCaAlF6 scintillators for neutron detection |
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| Institution: | 1. Institute of Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Japan;2. New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aramaki, Aoba-ku, Sendai, Japan;3. Tokuyama Corporation, Shibuya 3-chome, Shibuya, Japan;4. Department of Material, Physics and Energy Engineering, Nagoya University, Japan;1. The University of Tokyo, Tokyo, Japan;2. Union Materials Inc., Tone-machi, Ibaraki, Japan;3. Leading Edge Algorithm Co. Ltd., Hikaridai, Seikacho, Kyoto, Japan;1. Department of Nuclear Engineering and Management, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;2. Department of Bioengineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;3. Union Materials, Kitasoma, Ibaraki 300-1602, Japan;4. Leading Edge Algorithm, Kitakatsuragi, Nara 635-0822, Japan;1. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan;2. New Industry Creation Hatchery Center (NICHe) 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;3. C&A Corp. 1747-1 Makinohara, Mukawa-cho, Hokuto-shi Yamanashi 408-0302, Japan;1. College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;2. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China;1. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Torun, Poland;2. Institute of Electronic Materials Technology, Wolczynska 133, 01-919, Warsaw, Poland;3. Institute of Microelectronics and Optoelectronics, Koszykowa 75, 00-662, Warsaw, Poland |
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| Abstract: | Eu and Rb co-doped LiCaAlF6 (LiCAF) single crystals with different dopant concentrations were grown by the micro-pulling-down method for neutron detection. Their transmittance spectra showed strong absorption bands at 200–220 and 290–350 nm, and under 241Am alpha-ray excitation, their radioluminescence spectra exhibited an intense emission peak at 373 nm that was attributed to the Eu2+ 5d–4f transition. These results were consistent with those for the Rb-free Eu:LiCAF. The highest light yield among the grown crystals was 36,000 ph/n, which was 20% greater than that of the Rb-free crystal. In addition, the neutron-excited scintillation decay times were 650–750 ns slower than that of the Rb-free Eu:LiCAF. |
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| Keywords: | Single crystal Co-doping Thermal neutron Scintillator |
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