Shallow Traps in ${\rm YAlO}_{3}:{\rm Ce}$ Single Crystal Perovskites

The aim of this work is to investigate the influence of shallow traps on scintillating properties of YAlO₃:Ce. Wavelength-resolved thermally stimulated luminescence measurements following X-ray irradiation at 10 K have been performed on both undoped and Ce-doped crystals. Different and composite glow curves and emission spectra were obtained. Following glow peaks analysis of YAlO₃:Ce, their room temperature decay time was evaluated to be of the order of 10^-4 s. The presence of an athermal tunneling recombination process between traps and Ce³⁺ ions below 100 K has been evidenced by phosphorescence decays.