Scintillation properties of Y-Admixed Gd2Si2O7 scintillator

摘要

Pyrosilicate scintillation crystals are expected to be the next generation scintillators, because they have good light output and no hygroscopic nature. In this work, (Ce0.01Gd0.90Y0.09)(2)Si2O7 (Ce:Y-GPS) crystal was grown by the floating zone method. Emission wavelengths of this material were at 360 and 380 nm originated from Ce(3+)5d-4f transition, and these emission peaks were located at shorter wavelength side compared with Ce-doped (Gd, La)(2)Si2O7 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%).