Investigate the spectroscopic behavior, multisite luminescence, and decay dynamics of cerium-doped gadolinium aluminate (GdAlO3:Ce) crystal scintillators.
Characterized emission spectra and fluorescence decay times of Ce3+ ions embedded in GdAlO3 crystals.
Analyzed energy transfer pathways between ultraviolet-emitting centers, green-emitting centers, and the Gd3+ host lattice.
Identified at least three non-equivalent Ce3+ luminescence centers (multisites) within the GdAlO3 lattice.
Observed directional energy transfer from dominant ultraviolet-emitting Ce3+ centers to green-emitting centers.
Measured fast Ce3+ fluorescence decay times of 1.5 to 20 ns alongside slower decay components driven by multistep energy migration across the Gd3+ sublattice.
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