The process of hole and electron localization in LuAG:Ce,Mg ceramics is studied by electron spin resonance (ESR) and thermally stimulated luminescence (TSL). Hole traps, which are created by UV irradiation, are detected in the form of O- centers. Mg-perturbed variants of O- centers are proposed to exist. The thermal stability of such defects is studied, proving that they are stable up to room temperature. The interaction between O- centers and shallow electron traps is studied by thermally stimulated luminescence (TSL) and phosphorescence experiments, which reveal the occurrence of an a-thermal tunneling process between trapped electrons and randomly distributed Ce centers. By correlating the TSL-derived trap parameters and temperature dependent ESR intensities, it is found that O- centers compete with Ce centers in free electron capture.

Hu, C., Liu, S., Fasoli, M., Vedda, A., Nikl, M., Feng, X., et al. (2015). ESR and TSL study of hole and electron traps in LuAG:Ce,Mg ceramic scintillator. OPTICAL MATERIALS, 45, 252-257 [10.1016/j.optmat.2015.03.049].

ESR and TSL study of hole and electron traps in LuAG:Ce,Mg ceramic scintillator

FASOLI, MAURO;VEDDA, ANNA GRAZIELLA;
2015

Abstract

The process of hole and electron localization in LuAG:Ce,Mg ceramics is studied by electron spin resonance (ESR) and thermally stimulated luminescence (TSL). Hole traps, which are created by UV irradiation, are detected in the form of O- centers. Mg-perturbed variants of O- centers are proposed to exist. The thermal stability of such defects is studied, proving that they are stable up to room temperature. The interaction between O- centers and shallow electron traps is studied by thermally stimulated luminescence (TSL) and phosphorescence experiments, which reveal the occurrence of an a-thermal tunneling process between trapped electrons and randomly distributed Ce centers. By correlating the TSL-derived trap parameters and temperature dependent ESR intensities, it is found that O- centers compete with Ce centers in free electron capture.
Articolo in rivista - Articolo scientifico
Electron spin resonance; Electron traps; Garnet scintillator; Hole traps; Optical ceramics; Thermally stimulated luminescence; Ceramic materials; Electron spin resonance spectroscopy; Electron traps; Electrospinning; Hole traps; Luminescence; Magnetic moments; Paramagnetic resonance; Scintillation counters; Spin dynamics; Thermodynamic stability; Thermoluminescence; Ceramic scintillator; Electron localizations; Optical ceramics; Randomly distributed; Shallow electron trap; Temperature dependent; Thermally stimulated luminescence; Trapped electrons; Electrons
English
2015
45
252
257
none
Hu, C., Liu, S., Fasoli, M., Vedda, A., Nikl, M., Feng, X., et al. (2015). ESR and TSL study of hole and electron traps in LuAG:Ce,Mg ceramic scintillator. OPTICAL MATERIALS, 45, 252-257 [10.1016/j.optmat.2015.03.049].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/111724
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