| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10674907 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2005 | 8 Pages |
Abstract
In the present work γ-irradiation induced optical band gap variations (ÎEopt) were investigated on Ge-As-Se and Ge-As-Se-Te chalcogenide glasses. Higher doses of γ-irradiation resulted in decreased Eopt, which was composition dependent. Especially, glasses with stoichiometric compositions showed different ÎEopt from nonstoichiometric glasses under the same irradiation conditions. There seemed existence of a threshold Eopt (TE) under the certain dose of irradiation below which ÎEopt hardly occurred. Results were interpreted from viewpoint of glass structure, Chemical Bond Approach (CBA) and localized states density theory. Raman analysis supported well these discussions.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Fang Xia, S. Baccaro, Donghui Zhao, M. Falconieri, Guorong Chen,