کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5397845 1505875 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectrally resolved thermally stimulated luminescence of irradiated anion-defective alumina single crystals
ترجمه فارسی عنوان
لومینسانس تحریک شده توسط طیفی حل شده از کریستالهای آلومینایی آئروژن آبی تابش شده
کلمات کلیدی
آلومینا، لومینسانس، طیف انتشاری، نقص های کلیدی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
Thermally stimulated luminescence (TSL) spectra in the 313-580 K temperature range have been studied in anion-defective alumina crystals (named in literature as Al2O3:C) exposed to different irradiation doses. The TSL curve features two peaks with the maxima at Tm1=437 K and Tm2=565 K. The TSL spectrum of the first peak contains the emission of F centers and the R line of Cr3+ impurity ions. The absence of the emission of F+ centers indicates that electron traps are responsible for the first dosimetric TSL peak. The TSL spectrum of the second peak features emission bands of F, F+ centers, R line as well as a wide band centered at 550 nm and associated with the formation of aggregate centers (F2 and F22+) under irradiation. Possible excitation mechanisms of the TSL emission bands that involve both electron and hole traps related to anion vacancies and impurities are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 186, June 2017, Pages 189-193
نویسندگان
, , , , ,