Luminescence and Scintillation Properties of Ce-Doped YAP and LuYAP Crystals

摘要

The luminescence and gamma-ray detection properties of cerium-doped scintillators, namely, Lu_(0.3)Y_(0.7)AlO_3:Ce (Lu_(0.3)Y_(0.7)AP:Ce), Lu_(0.7)Y_(0.3)AlO_3:Ce (Lu_(0.7)Y_(0.3)AP:Ce), and YAlO_3:Ce (YAP:Ce) were investigated. UV excitation and emission spectra of studied crystals were compared. The light yield and energy resolution were measured using photomultiplier tube (PMT) readout. The light yield non-proportionality and energy resolution versus gamma-ray energy were measured and the intrinsic resolution of the crystals was determined after correcting the measured energy resolution for PMT statistics. For 662 keV gamma rays (~(137)Cs source), YAP: Ce showed the highest light yield of 28,500 ph/MeV and the best energy resolution of 4.4%, while its photofraction is worst.