Fabrication of Ce:(Gd2Y)(Ga3Al2)O12 scintillator ceramic by oxygen-atmosphere sintering and hot isostatic pressing

A Ce-doped (Gd 2 Y)(Ga 3 Al 2 )O 12 ceramic with good performance was fabricated by sintering in an oxygen atmosphere and hot isostatic pressing . The microstructure as well as the optical and scintillation characteristics of the ceramic was investigated. The ceramic exhibited a high transmittance of 78% in the range of 500–800   nm. The radioluminescence intensity of the ceramic reached up to 30 times that of a bismuth germinate single crystal , and the light yield within 750   ns shaping time was approximately 25800 photons/MeV under 137 Cs γ-ray irradiation.