Optical and scintillation characteristics of Gd2YAl2Ga3O12:Ce and Lu2YAl2Ga3O12:Ce single crystals.

The optical and scintillation characteristics of Gd 2 YAl 2 Ga 3 O 12 :Ce and Lu 2 YAl 2 Ga 3 O 12 :Ce single crystals are investigated. At 662 keV γ-rays, light yield (LY) of 37,900 ph/MeV and energy resolution of 7.0% obtained for Gd 2 YAl 2 Ga 3 O 12 :Ce are superior to those of 18,900 ph/MeV and 11.5% obtained for Lu 2 YAl 2 Ga 3 O 12 :Ce. Scintillation decays are measured using the time-correlated single photon counting technique. A fast component decay time of 45 ns with relative intensity of 88% obtained for Lu 2 YAl 2 Ga 3 O 12 :Ce is superior to that of 50 ns (65%) for Gd 2 YAl 2 Ga 3 O 12 :Ce. The linear attenuation coefficient at 662 keV γ-rays is also determined and discussed. [ABSTRACT FROM AUTHOR]