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The scintillation properties of Gd 3 Al 2 Ga 3 O 12 :Ce 3+ (GAGG:Ce) single crystals grown by Czochralski method with 1 at.% cerium in the melt were investigated and results compared with so far published results in literature. The light yield (LY) and energy resolution were measured using XP5200B photomultiplier. Despite about twice higher LY for GAGG:Ce, the energy resolution is only slightly better than that of LuAG:Ce due to its worse intrinsic resolution and non-proportionality of LY. The LY dependences on the sample thickness and amplifier shaping time were measured. The estimated photofraction in pulse height spectra of 320 and 662 keV -rays and the total mass attenuation coefficient at 662 keV -rays were also determined and compared with the theoretical ones calculated using the WinXCom program.

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