期刊
JOURNAL OF CRYSTAL GROWTH
卷 312, 期 21, 页码 3136-3142出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2010.07.042
关键词
Defects; Bridgman technique; Rare-earth compounds; Scintillator materials
LuAG:Ce single crystals with various activator concentrations were grown by the vertical Bridgman technique. Characterization of crystals was done in terms of actual doping level, macroscopic defects and degree of non-equivalent substitutions by Lu for Al in octahedral lattice sites. Scintillation measurements were performed using 2 x 2 x 8 mm(3) shaped samples with Ce concentration in the range 0.05-0.55 at%. Essential improvement of performance was demonstrated in samples containing >= 0.2 at% of Ce; the light yield measured in LuAG:Ce (0.55 at%) was about 26000 ph/MeV, or close to that of LSO.(C) 2010 Elsevier B.V. All rights reserved.
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