Luminescence and scintillation properties of rare-earth-doped LuF3 scintillation crystals |
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| Affiliation: | 1. NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 9808579, Japan;2. Institute of Physics AS CR, Cukrovarnicka 10, Prague 6 16200, Czech Republic;3. Tokuyama Corporation, 1-1 Mikage-cho, Shunan-shi, Yamaguchi 7458648, Japan;4. Institute for Materials Research, 2-1-1 Katahira, Aoba-ku, Sendai 9808577, Japan;1. Depto. de Física de Materiales, C-04, Universidad Autónoma de Madrid, Avda. Francisco Tomás y Valiente 7, 28049 Madrid, Spain;2. Instituto de Ciencia de Materiales de Sevilla, CSIC-US, C/Américo Vespucio 49, Isla de la Cartuja, 41092 Sevilla, Spain;1. Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan;2. Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan;1. Department of Applied Physics and I3A, Faculty of Sciences, University of Zaragoza, C/P. Cerbuna 12, 50009 Zaragoza, Spain;2. Department Basis of Electronics, Optoelectronics and Optical Integrated Components Group, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania;1. Kromek Group plc, Thomas Wright Way, NETPark, Sedgefield, County Durham, TS21 3FD, UK;2. Department of Physics Durham University, South Road, Durham, DH1 3LE, UK |
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| Abstract: | The Nd-doped and Er-doped LuF3 single crystals were grown by the micro-pulling-down method to study their scintillation properties in the vacuum-ultraviolet (VUV) region. The doubly Nd–Er codoped single crystal was grown to study possibility of scintillation performance improvement by energy transfer from Er3+ to Nd3+ ions. The LiF flux was to avoid phase transition below melting temperature. The 1%Nd-doped sample showed the highest overall scintillation efficiency under X-ray excitation which was 7 times as high as that of the LaF3:Nd 8% standard. The leading Nd3+ 5d–4f emission was situated at 176 nm, while the Er3+ 5d–4f emission for Er-doped samples was observed at 163 nm, which better matches the sensitivity of some VUV-sensitive photodetectors. The optimum Er concentration was determined to be around 1–3 mol%. No Er3+ 5d–4f emission was observed for the doubly Er,Nd-codoped sample due to energy transfer from the Er3+ to Nd3+ ions. Slight improvement of the light yield was observed in the doubly-doped sample with respect to the Nd-only doped one. |
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| Keywords: | Lutetium fluoride Scintillator VUV luminescence |
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