Temperature dependence of scintillation properties and pulse shape discrimination between γ- and α-rays in Gd_3Al_2Ga_3O_(12):Ce scintillator

摘要

The light yield (LY) and decay kinetics of a single crystal scintillator of Gd3Al2Ga3O12(GAGG):Ce were measured for 0.662 MeV gamma- and 5.48 MeV alpha-rays between -100 degrees C and room temperature. As the temperature decreased, the LY increased by 20% for gamma-rays, reaching its maximum at around -70 degrees C, and increased monotonously by 50% for gamma-rays. Both the rise and decay times increased gradually. Furthermore, the results indicate that pulse shape discrimination is most effective at room temperature.