کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1888028 1533400 2016 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of annealing on the scintillation properties of zinc oxide powders and ceramics
ترجمه فارسی عنوان
تأثیر آنیلینگ بر خواص Scintillation پودرهای اکسید روی و سرامیک
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
چکیده انگلیسی


• Different annealing atmospheres produce different luminescence centers in powders.
• Luminescence of each center is accompanied by specific decay curve.
• Intensity of emission of ceramics can be increased by hydrogenous annealing.
• Depth of hydrogenous annealing effect in ceramics is about 100 μm.

It was shown that annealing ZnO and ZnO:Ga initial powders and ceramics in different atmospheres significantly changes the characteristics of the studied samples. Two main luminescence bands of different origins were observed in powders at 540 nm and 580 nm. Annealing either in vacuum or in Ar:H2 atmosphere increased intensity of green luminescence with peak at 540 nm whereas annealing in air enhanced a luminescence band with peak at 580 nm in the powders. Corresponding changes in luminescence kinetic properties were observed. Annealing of the ceramics in vacuum and air did not affect the luminescence properties, while annealing them in Ar:H2 atmosphere increased green luminescence intensity of undoped ceramics and excitonic luminescence intensity of doped ones. Comparison of the X-ray, gamma-ray and cathode-ray excited luminescence lead to conclusion that the enhancement of luminescence intensity took place in surface layer of about 100 μm thickness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Measurements - Volume 90, July 2016, Pages 136–139
نویسندگان
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