Shallow traps in YAl[O.sub.3] : Ce single crystal perovskites

The aim of this work is to investigate the influence of shallow traps on scintillating properties of YAl[O.sub.3] : 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 YAl[O.sub.3] : Ce, their room temperature decay time was evaluated to be of the order of [10.sup.-4] s. The presence of an athermal tunneling recombination process between traps and [Ce.sup.3+] ions below 100 K has been evidenced by phosphorescence decays. Index Terms--Perovskites, scintillators, thermally stimulated luminescence, YAP.