کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5359784 1503705 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Positron annihilation study on ZnO-based scintillating glasses
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Positron annihilation study on ZnO-based scintillating glasses
چکیده انگلیسی

Positron lifetime of ZnO-based scintillating glasses (55 − x)SiO2-45ZnO-xBaF2 (x = 5, 10, 15 mol%) were measured with a conventional fast-fast spectrometer. Three positron lifetime components τ1, τ2, and τ3 are ∼0.23 ns, ∼0.45 ns, and ∼1.6 ns, respectively. All the three positron lifetime components first increase with increasing BaF2 concentration from 5 mol% to 10 mol%, then decreases as BaF2 further increases to 15 mol%. The result suggests that the glass sample with 10 mol% BaF2 contains the highest defect density, and is in excellent agreement with glass chemistry, glass density, thermal properties, and calculated crystallinity. Therefore, positron annihilation lifetime measurement is an effective tool for analyzing defects in ZnO-based scintillating glasses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issues 13–14, 15 April 2009, Pages 6551-6554
نویسندگان
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