کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5404149 1505932 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vacuum ultraviolet and ultraviolet spectroscopy of BaMgF4 codoped with Ce3+ and Na+
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Vacuum ultraviolet and ultraviolet spectroscopy of BaMgF4 codoped with Ce3+ and Na+
چکیده انگلیسی
Ce3+/Na+-doped BaMgF4 (BMF) crystals with a nonlinear property show strong absorption in the vacuum ultraviolet (VUV) and ultraviolet (UV) ranges. Three different fluorescence bands (A, B, C) at 300, 340, and 430 nm were observed when pumped at different wavelengths. Under excitation of the fourth harmonic (266 nm) from a pulsed Nd:YAG laser the BMF crystal changed its colour from transparent to brown due to formation of colour centres. The A, B and C bands are assigned to three different sites of Ce3+: site A is Ce3+ substituting for perfect Ba2+ sites; site B is Ce3+ (Ba2+) perturbed by Na+ as a charge compensator; and site C is a complex composed of Ce3+ and F− vacancies, which trapped one or two electrons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volumes 119–120, July–October 2006, Pages 69-74
نویسندگان
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