An as-fabricated cerium-doped ceramic scintillator Gd3Al2Ga3O12 (Ce:GAGG) was thermally annealed at different temperatures. The light output and energy resolution of the scintillators were measured before and after thermal treatment. The effect of thermal annealing in the air at high temperature (at 1000 °C for 5 hours) deforms the microstructure by mitigating oxygen vacancies of the ceramic scintillator. This has been proven by XPS study that showed the existence of oxygen vacancies and subsequent decrease of oxygen deficiency amid annealing treatment that led to an output signal increase. The diffusion ability of oxygen atoms by annealing played a key role in compensating for defect sites. In this study, by controlling thermodynamic conditions, the light output was enhanced by ∼30.4% and the energy resolution improved by ∼2.4% after annealing at 1000 °C in the air.
- Energy resolution
- Light output
- X-ray Photoelectron Spectroscopy
ASJC Scopus subject areas
- Physics and Astronomy(all)