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Alpha–gamma pulse-shape discrimination in Gd3Al2Ga3O12 (GAGG):Ce3+ crystal scintillator using shape indicator

2015; Elsevier BV; Volume: 795; Linguagem: Inglês

10.1016/j.nima.2015.05.052

1872-9576

Y. Tamagawa, Y. Inukai, Izumi Ogawa, M. Kobayashi,

Medical Imaging Techniques and Applications

The pulse-shape discrimination (PSD) in a GAGG single-crystal scintillator was studied by using a shape indicator (SI) parameter of the optimal digital filter method. SI is one of the most useful PSD methods that use typical pulse shapes. Excellent discrimination between 0.662 MeV γ-rays and 5.48 MeV α-rays was achieved. For a cut at SI=0.0056, 99.95% of the γ-rays and only 0.22% of the α-rays were retained. Selection of background events (γ and α) in the GAGG scintillator was achieved by using the PSD method.