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8472293 
Journal Article 
Ga for Al substitution effects on the garnet phase stability and luminescence properties of Gd3GaxAl5-xO12:Ce single crystals 
Bartosiewicz, K; Babin, V; Kamada, K; Yoshikawa, A; Kurosawa, S; Beitlerova, A; Kucerkova, R; Nikl, M; Zorenko, Yu; , 
2019 
Yes 
Journal of Luminescence
ISSN: 0022-2313 
ELSEVIER 
AMSTERDAM 
116724 
WOS:000493395400026 
This research deals with the luminescence and physical properties of Gd-3 (Ga,Al)(5)O-12:Ce single crystal set and it is a complementary study to analogous (Y,Gd)(3)Al5O12:Ce and (Gd,Lu)(3)Al5O12:Ce single crystal sets. Those three groups of materials show similar luminescence and physical properties. In this research, the influence of substitution Ga for Al in Gd-3(Ga,Al)(5)O-12:Ce single crystals on the luminescence and scintillation characteristics as well as thermodynamical stability of the garnet phase is studied, and it is compared to (Y,Gd)(3)Al5O12:Ce and (Gd,Lu)(3)Al5O12:Ce single crystal sets. The unbalanced substitution Ga for Al makes garnet phase thermodynamically unstable and leads to the formation of the multiphase system with luminescence centers in UV and visible spectral ranges. The wavelength-dispersive X-ray spectroscopy, X-ray powder diffraction analysis, photoluminescence and decay kinetic measurements reviled all phase types within multiphase crystals. Temperature dependent measurements were applied to determine the quenching mechanism for Ce3+ luminescence. The timing characteristics are studied as the function of Ga content.