Luminescence and ESR Study of Irregular Ce$^{3+}$ Ions in LuAG:Ce Single Crystals

Luminescence of new irregular Ce
³⁺
-related centers: the unperturbed and perturbed Ce
³⁺
ions located in Al
³⁺
sites and the Ce
³⁺

_Lu
ions perturbed by Lu
³⁺

_Al
ions was found. The systematic study of these centers by means of the ESR and luminescence methods and their influence on scintillation characteristics was performed. The structure and symmetry of the irregular Ce
³⁺
centers was established and their spectral characteristics were explained.