The scintillation properties of LYSO:Ce and LSO:Ce were studied for γ-ray detection. The energy
resolution of 8.2% for 662 keV γ-rays obtained with LYSO:Ce is better than that of 10.6% for LSO:Ce.
LYSO:Ce showed a better energy resolution compared with LSO:Ce. The reason is a higher
photoelectron yield and a lower contribution of intrinsic resolution for LYSO:Ce. It confirms that the
intrinsic resolution of the scintillators is correlated with the non-proportionality in the scintillation
response.
In conclusion, the main advantages of LYSO:Ce is a high light yield. This together with high density
and photofraction make it very promising scintillator for γ-ray detection and PET medical imaging.