Data di Pubblicazione:
2019
Citazione:
Evidence of Optically Stimulated Luminescence in Lu3Al5O12:Ce / S. Gallo, I. Veronese, A. Vedda, M. Fasoli. - In: PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE. - ISSN 1862-6319. - (2019 Apr 26). [Epub ahead of print] [10.1002/pssa.201900103]
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 Cs1) using red light, a direct measurement of
the OSL decay curve and of the resulting characteristic Ce3þ 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 600–650nm
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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
TSL; OSL; LuAG; Dosimetry
Elenco autori:
S. Gallo, I. Veronese, A. Vedda, M. Fasoli
Link alla scheda completa: