Optical emissions at 2.1, 2.6, 3.0, and 4.5 eV, excited by synchrotron radiation from 5 to 18 eV, were found in stishovite, a high-density sixfold-coordinated SiO2 polymorph. Luminescence and lifetime data were analyzed from 10 to 300 K showing a transition scheme distinct from that of silica, despite some similarities in the spectral positions. The results give a basis for the study of defect structures in sixfold-coordinated SiO2 environments, for theoretical calculations of the optical response of high-density SiO2, and for a microfluorescence identification of geologic stishovite.

Paleari, A., Chiodini, N., DI MARTINO, D., Meinardi, F., Fumagalli, P. (2003). Ultraviolet-excited radiative decay channels of defect states in high-density sixfold-coordinated SiO2. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 68(18) [10.1103/PhysRevB.68.184107].

Ultraviolet-excited radiative decay channels of defect states in high-density sixfold-coordinated SiO2

PALEARI, ALBERTO MARIA FELICE
;
CHIODINI, NORBERTO;DI MARTINO, DANIELA;MEINARDI, FRANCESCO;
2003

Abstract

Optical emissions at 2.1, 2.6, 3.0, and 4.5 eV, excited by synchrotron radiation from 5 to 18 eV, were found in stishovite, a high-density sixfold-coordinated SiO2 polymorph. Luminescence and lifetime data were analyzed from 10 to 300 K showing a transition scheme distinct from that of silica, despite some similarities in the spectral positions. The results give a basis for the study of defect structures in sixfold-coordinated SiO2 environments, for theoretical calculations of the optical response of high-density SiO2, and for a microfluorescence identification of geologic stishovite.
Articolo in rivista - Articolo scientifico
stishovite, optical emission
English
2003
68
18
none
Paleari, A., Chiodini, N., DI MARTINO, D., Meinardi, F., Fumagalli, P. (2003). Ultraviolet-excited radiative decay channels of defect states in high-density sixfold-coordinated SiO2. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 68(18) [10.1103/PhysRevB.68.184107].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/1667
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