کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10674907 1010552 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gamma ray irradiation induced optical band gap variations in chalcogenide glasses
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Gamma ray irradiation induced optical band gap variations in chalcogenide glasses
چکیده انگلیسی
In the present work γ-irradiation induced optical band gap variations (ΔEopt) 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 ΔEopt from nonstoichiometric glasses under the same irradiation conditions. There seemed existence of a threshold Eopt (TE) under the certain dose of irradiation below which ΔEopt 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 234, Issue 4, July 2005, Pages 525-532
نویسندگان
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