Lutetium aluminum garnet, commonly known as LuAG, is a versatile material finding numerous optical applications, and whose scintillation properties have been widely investigated. In this study, experimental evidences of optically stimulated luminescence (OSL) phenomena occurring in LuAG:Ce crystals are shown. After demonstrating the possibility to optically bleach an electron trap responsible for a thermally stimulated luminescence (TSL) peak at 280 °C (heating rate 1.7 °C s−1) using red light, a direct measurement of the OSL decay curve and of the resulting characteristic Ce3+ 5d-4f emission spectrum is carried out. The assessment of the bleaching spectrum of the TSL peak at 280 °C reveals that light with wavelength in the 600–650 nm interval is the most efficient in depleting the TSL peak, making He-Ne lasers suitable sources of optical stimulation. The finding of OSL features in LuAG:Ce paves the way to new application perspectives. In particular, the achievement of a good balance between scintillation and energy storage properties of LuAG.Ce can drive a constructive integration between X-rays imaging approaches based on photo-stimulable phosphors and those exploiting scintillating materials.

Gallo, S., Veronese, I., Vedda, A., Fasoli, M. (2019). Evidence of Optically Stimulated Luminescence in Lu3Al5O12:Ce. PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE, 216(14) [10.1002/pssa.201900103].

Evidence of Optically Stimulated Luminescence in Lu3Al5O12:Ce

Vedda, A;Fasoli, M
2019

Abstract

Lutetium aluminum garnet, commonly known as LuAG, is a versatile material finding numerous optical applications, and whose scintillation properties have been widely investigated. In this study, experimental evidences of optically stimulated luminescence (OSL) phenomena occurring in LuAG:Ce crystals are shown. After demonstrating the possibility to optically bleach an electron trap responsible for a thermally stimulated luminescence (TSL) peak at 280 °C (heating rate 1.7 °C s−1) using red light, a direct measurement of the OSL decay curve and of the resulting characteristic Ce3+ 5d-4f emission spectrum is carried out. The assessment of the bleaching spectrum of the TSL peak at 280 °C reveals that light with wavelength in the 600–650 nm interval is the most efficient in depleting the TSL peak, making He-Ne lasers suitable sources of optical stimulation. The finding of OSL features in LuAG:Ce paves the way to new application perspectives. In particular, the achievement of a good balance between scintillation and energy storage properties of LuAG.Ce can drive a constructive integration between X-rays imaging approaches based on photo-stimulable phosphors and those exploiting scintillating materials.
Articolo in rivista - Articolo scientifico
cerium; LuAG; optically stimulated luminescence; thermally stimulated luminescence;
English
2019
216
14
1900103
none
Gallo, S., Veronese, I., Vedda, A., Fasoli, M. (2019). Evidence of Optically Stimulated Luminescence in Lu3Al5O12:Ce. PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE, 216(14) [10.1002/pssa.201900103].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/227452
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