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Crystals 2017, 7(9), 262; doi:10.3390/cryst7090262

LPE Growth of Single Crystalline Film Scintillators Based on Ce3+ Doped Tb3−xGdxAl5−yGayO12 Mixed Garnets

1
Institute of Physics, Kazimierz Wielki University in Bydgoszcz, 85090 Bydgoszcz, Poland
2
Institute for Scintillation Materials, National Academy of Sciences of Ukraine, 61001 Kharkiv, Ukraine
3
SSI Institute for Single Crystals, National Academy of Sciences of Ukraine, 61178 Kharkiv, Ukraine
4
Institute of Nuclear Physics, Polish Academy of Sciences, 31342 Krakow, Poland
*
Authors to whom correspondence should be addressed.
Received: 24 July 2017 / Revised: 24 August 2017 / Accepted: 25 August 2017 / Published: 30 August 2017
(This article belongs to the Special Issue Luminescent Properties of Lanthanoid Doped Crystals)
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Abstract

The growth of single crystalline films (SCFs) with excellent scintillation properties based on the Tb1.5Gd1.5Al5−yGayO12:Ce mixed garnet at y = 2–3.85 by Liquid Phase Epitaxy (LPE) method onto Gd3Al2.5Ga2.5O12 (GAGG) substrates from BaO based flux is reported in this work. We have found that the best scintillation properties are shown by Tb1.5Gd1.5Al3Ga2O12:Ce SCFs. These SCFs possess the highest light yield (LY) ever obtained in our group for LPE grown garnet SCF scintillators exceeding by at least 10% the LY of previously reported Lu1.5Gd1.5Al2.75Ga2.25O12:Ce and Gd3Al2–2.75 Ga3–2.25O12:Ce SCF scintillators, grown from BaO based flux. Under α-particles excitation, the Tb1.5Gd1.5 Al3Ga2O12:Ce SCF show LY comparable with that of high-quality Gd3Al2.5Ga2.5O12:Ce single crystal (SC) scintillator with the LY above 10,000 photons/MeV but faster (at least by 2 times) scintillation decay times t1/e and t1/20 of 230 and 730 ns, respectively. The LY of Tb1.5Gd1.5Al2.5Ga2.5O12:Ce SCFs, grown from PbO flux, is comparable with the LY of their counterparts grown from BaO flux, but these SCFs possess slightly slower scintillation response with decay times t1/e and t1/20 of 330 and 990 ns, respectively. Taking into account that the SCFs of the Tb1.5Gd1.5Al3–2.25Ga2–2.75O12:Ce garnet can also be grown onto Ce3+ doped GAGG substrates, the LPE method can also be used for the creation of the hybrid film-substrate scintillators for simultaneous registration of the different components of ionization fluxes. View Full-Text
Keywords: liquid phase epitaxy; single crystalline films; scintillators; mixed garnets; Tb3+ cations liquid phase epitaxy; single crystalline films; scintillators; mixed garnets; Tb3+ cations
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Gorbenko, V.; Zorenko, T.; Witkiewicz, S.; Paprocki, K.; Sidletskiy, O.; Fedorov, A.; Bilski, P.; Twardak, A.; Zorenko, Y. LPE Growth of Single Crystalline Film Scintillators Based on Ce3+ Doped Tb3−xGdxAl5−yGayO12 Mixed Garnets. Crystals 2017, 7, 262.

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