Journal
JOURNAL OF CRYSTAL GROWTH
Volume 468, Issue -, Pages 420-423Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2016.12.054
Keywords
Czochralski method; Single crystal growth; Gadolinium compounds; Gallium compounds; Oxides; Scintillator materials
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Mg co-doped Ce1%: Gd3GaxAl5-xO12 (Ce:GAGG) crystals (x=2.4, 2.7, 3.0) were successfully grown by the Czochralski (Cz) method. Effect of Mg co-doping on the scintillation properties of Ce: GAGG was examined. This study covers measurements of solidification fraction and scintillation properties such as light yield, energy resolution and non-proportionality for each crystal. Pulse-height spectra of various gamma and X-ray sources with energies ranged from 30 keV to 662 keV were measured. Regardless of the presence/absence of Mg dopant, the non-proportionality curves with lower content of gallium in the crystal structure tend to improve. Mg co-doped Ce: GAGG samples did not show a significant difference as compared with non co-doped Ce: GAGG. Mg co-doped crystals with x=2.4 and 2.7 showed the promising scintillation properties of faster decay time and higher energy resolution than those with x=3.0.
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