1. On the Quenching Mechanism of Ce, Tb Luminescence and Scintillation in Compositionally Disordered (Gd, Y, Yb) 3 Al 2 Ga 3 O 12 Garnet Ceramics.
- Author
-
Dubov, Valery, Kuznetsova, Daria, Kamenskikh, Irina, Komendo, Ilia, Malashkevich, Georgii, Ramanenka, Andrei, Retivov, Vasili, Talochka, Yauheni, Vasil'ev, Andrei, and Korzhik, Mikhail
- Subjects
TERBIUM ,YTTERBIUM ,YTTERBIUM ions ,GARNET ,LUMINESCENCE ,CERAMICS - Abstract
Two series of (Gd, Y, Yb)
3 Al2 Ga3 O12 quintuple compounds with a garnet structure and solely doped with Ce and Tb were prepared in the form of ceramics by sintering in oxygen at 1600 °C for two hours and studied for the interaction of activator ions with ytterbium ions entering the matrix. It was shown that the photoluminescence and scintillation of Ce3+ ions are completely suppressed, predominantly by tunneling ionization through the charge transfer state (CTS) of the Ce4+ -Yb2+ ions. The photoluminescence of Tb3+ ions is quenched in the presence of ytterbium, but not completely due to the poor resonance conditions of Tb3+ intraconfiguration transitions and the CTS of the single Yb3+ and the CTS of Ce4+ -Yb2+ ions. The scintillation in the visible range of both Ce3+ - and Tb3+ -doped samples is intensely quenched as well, which indicates strong competition from Yb3+ ions to activators in interaction with the Gd substrate. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF