Temperature dependence of scintillation properties and pulse shape discrimination between γ- and α-rays in Gd3Al2Ga3O12:Ce scintillator

Abstract The light yield (LY) and decay kinetics of a single crystal scintillator of Gd 3 Al 2 Ga 3 O 12 (GAGG):Ce were measured for 0.662 MeV γ - and 5.48 MeV α -rays between −100 °C and room temperature. As the temperature decreased, the LY increased by 20% for γ -rays, reaching its maximum at around −70 °C, and increased monotonously by 50% for α -rays. Both the rise and decay times increased gradually. Furthermore, the results indicate that pulse shape discrimination is most effective at room temperature.