Journal
JOURNAL OF CRYSTAL GROWTH
Volume 292, Issue 2, Pages 416-421Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2006.04.048
Keywords
defects; doping; micro-pulling-down technique; single crystal growth; scintillator materials
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Development, preparation and characterization of several new single-crystal scintillators based on binary and complex oxide or fluoride host crystals is reviewed. The micropulling-down technique was used to efficiently screen and optimize the material composition. The Czochralski technique was used to obtain large bulk single crystals with the ultimate scintillation performance. Yb-doped YAlO3 and Lu3Al5O12 were developed to obtain superfast scintillators at room temperature. They also present a unique material system with temperature-tuned scintillation response over the nanosecond time scale. Usage of ZnO single crystals for superfast scintillators is discussed. Several well-known garnet and silicate hosts were doped with Pr3+ to obtain faster-then-Ce3+ scintillators and their performance was tested. Two new concepts of the host-to-dopant energy transfer were realized in the Ce-doped (i) PrF3 single crystals and (ii) congruently melting Me2+-codoped (YF3-GdF3) solid solutions. (c) 2006 Elsevier B.V. All rights reserved.
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