Scintillation properties of Y-Admixed Gd2Si2O7 scintillator

Pyrosilicate scintillation crystals are expected to be the next generation scintillators, because they have good light output and no hygroscopic nature. In this work, (Ce0.01 Gd0.90 Y0.09)2Si2O7 (Ce:Y-GPS) crystal was grown by the floating zone method. Emission wavelengths of this material were at 360 and 380 nm originated from Ce3+ 5d-4f transition, and these emission peaks were located at shorter wavelength side compared with Ce-doped (Gd, La)2Si2O7 due to the change of the crystal field. Gamma-ray-excited pulse height and scintillation decay measurements showed that Ce:Y-GPS had a light output of 48,000 ± 3000 photons/MeV, FWHM energy resolution of 11.8 ± 0.5% at 662 keV and the decay time components of 42 ± 1 ns (58 ± 2%) and 180 ± 10 ns (42 ± 2%).