Evaluation of Gd2SiO5:Ce (GSO), Lu2−xGdxSiO5:Ce (LGSO), and Lu2−xYxSiO5:Ce (LYSO) crystalline scintillators using a photoacoustic spectroscopy technique

Abstract

We evaluated the nonradiative deactivation in three scintillators, Gd2SiO5:Ce (GSO), Lu2−xGdxSiO5:Ce (LGSO), and Lu2−xYxSiO5:Ce (LYSO), using a photoacoustic spectroscopy technique (PAS). The photoacoustic (PA) spectra suggested that part of the absorption energy for the excitation of Ce3+ will be released as heat through a nonradiative deactivation process. GSO exhibits an intense PA signal compared with LGSO and LYSO because of its energy migration process from Gd3+ to Ce3+ emission centers.