TY - JOUR
T1 - Energy migration processes in undoped and Ce-doped multicomponent garnet single crystal scintillators
AU - Bartosiewicz, K.
AU - Babin, V.
AU - Kamada, K.
AU - Yoshikawa, A.
AU - Nikl, M.
N1 - Funding Information:
Financial support of Czech science foundation No. P204/12/0805 and EC Marie Curie Initial Training Network LUMINET , No. 316906 , projects are gratefully acknowledged.
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/6/4
Y1 - 2015/6/4
N2 - Multicomponent garnets (Y3-xGdxAl5-yGayO12) doped with Ce3+ ions are promising scintillators with a high density, fast response time and high light yield. To deepen the knowledge about the transfer stage of scintillation mechanism we discuss the energy migration and energy transfer processes in the set of undoped and Ce3+ activated multicomponent garnet single crystals. Temperature dependence of Gd3+ emission intensities as well as decay kinetics in Y3-xGdxAl5-yGayO12 (x,y=1,2,3) crystals point to the Gd3+→Gd3+ nonradiative energy migration, which is diffusion limited. Concentration quenching of Gd3+ emission occurs by energy migration to accidental impurities and/or structure defects. Temperature dependence of photoluminescence emission intensities and decay time measurements of Gd3+ as well as Ce3+ ions in Gd3Ga3Al2O12:Ce3+ single crystal reveal nonradiative energy transfer Gd3+→Ce3+ (including migration through Gd3+ sublattice) which is responsible for slow Ce3+ fluorescence decay component.
AB - Multicomponent garnets (Y3-xGdxAl5-yGayO12) doped with Ce3+ ions are promising scintillators with a high density, fast response time and high light yield. To deepen the knowledge about the transfer stage of scintillation mechanism we discuss the energy migration and energy transfer processes in the set of undoped and Ce3+ activated multicomponent garnet single crystals. Temperature dependence of Gd3+ emission intensities as well as decay kinetics in Y3-xGdxAl5-yGayO12 (x,y=1,2,3) crystals point to the Gd3+→Gd3+ nonradiative energy migration, which is diffusion limited. Concentration quenching of Gd3+ emission occurs by energy migration to accidental impurities and/or structure defects. Temperature dependence of photoluminescence emission intensities and decay time measurements of Gd3+ as well as Ce3+ ions in Gd3Ga3Al2O12:Ce3+ single crystal reveal nonradiative energy transfer Gd3+→Ce3+ (including migration through Gd3+ sublattice) which is responsible for slow Ce3+ fluorescence decay component.
KW - Ce<sup>3+</sup>
KW - Energy transfer
KW - Luminescence
KW - Multicomponent garnets
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U2 - 10.1016/j.jlumin.2015.05.015
DO - 10.1016/j.jlumin.2015.05.015
M3 - Article
AN - SCOPUS:84930940107
SN - 0022-2313
VL - 166
SP - 117
EP - 122
JO - Journal of Luminescence
JF - Journal of Luminescence
ER -