Crystal growth and scintillation properties of Ce doped (Gd,Y)AlO 3 perovskite single crystals

Ce1%:(Gd x Y 1‐x )AlO 3 (x=0, 0.2, 0.4, 0.6, 0.8 and 1) crystals were grown by the μ‐PD method with RF heating system. All of the grown crystals show single perovskite phase. Ce 3+ 4f‐5d emission is observed within 360‐400nm wavelength. Emission peak shifts to shorter wavelength with increasing Y concentration. In order to determine light yield, the energy spectra were collected under 662 keV γ‐ray excitation ( 137 Cs source) and detection by an PMT R6451(Hamamatsu). The light yield was calculated by comparing to LYSO standard. The light yield of Ce1%:(Gd x Y 1‐x )AlO 3 samples were increased with increasing Y concentration and Ce1%:Gd 0.6 Y 0.4 AlO 3 sample shows the highest light yield of 14,000 photon/MeV. Scintillation decay time was around 14.4 ns (16%) with slower decay component of.139 ns (84%) (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)