کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5398972 1505899 2015 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electronic structure and Fano antiresonance of chromium Cr(III) ions in alkali silicate glasses
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Electronic structure and Fano antiresonance of chromium Cr(III) ions in alkali silicate glasses
چکیده انگلیسی
The optical properties of the Cr3+ doped in alkali silicate glasses X2O-SiO2 with different modifier cations X=Li, Na and K have been investigated by Villian et al. This work investigates a theoretical crystal-field analysis of the electronic energy levels of Cr3+ in these glasses. This analysis based on the Racah theory was carried out for the Chromium (III) center with an Oh site symmetry. The objective of this study is to determine the effect of glass matrix modifier on the Racah B, C and crystal-field Dq parameters. The effect of the glass matrix environment on these parameters is also reported by comparison with alkali cadmium borosulphate, phosphate and borate glasses. The interference dips observed in the broad band 4T2g(4F) result from interaction with the 2Eg(2G) and 2T1g(2G) sharp levels are known as the Fano antiresonance model. This feature is qualitatively studied using the adiabatic potential surfaces for the quartet 4T2g(4F) and doublet 2Eg(2G) levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 161, May 2015, Pages 368-373
نویسندگان
, , ,