Participation of shallow and deep traps in the processes of energy transfer and capture is studied by means of time- resolved emission spectroscopy and thermoluminescence in several groups of Ce3+ and Pr3+-doped complex oxide single crystal scintillators. Tunnelling-driven recombination processes are distinguished in all the examined materials: closely spaced electron and hole traps give rise to the t-1 phosphorescence decays at low temperatures in the Ce-doped aluminum garnets and perovskites, while thermally assisted tunneling process is proposed to explain the temperature independent trap depth in glow curve peaks within 50-250 C in Ce-doped lutetium orthosilicates.
Nikl, M., Mihokova, E., Pejchal, J., Vedda, A., Fasoli, M., Fontana, I., et al. (2008). Scintillator Materials — Achievements, Opportunities, and Puzzles. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 55(3), 1035-1041 [10.1109/TNS.2007.913480].
Scintillator Materials — Achievements, Opportunities, and Puzzles
VEDDA, ANNA GRAZIELLA;FASOLI, MAURO;
2008
Abstract
Participation of shallow and deep traps in the processes of energy transfer and capture is studied by means of time- resolved emission spectroscopy and thermoluminescence in several groups of Ce3+ and Pr3+-doped complex oxide single crystal scintillators. Tunnelling-driven recombination processes are distinguished in all the examined materials: closely spaced electron and hole traps give rise to the t-1 phosphorescence decays at low temperatures in the Ce-doped aluminum garnets and perovskites, while thermally assisted tunneling process is proposed to explain the temperature independent trap depth in glow curve peaks within 50-250 C in Ce-doped lutetium orthosilicates.
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