کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1884803 1043368 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Positronium yields in amorphous, cross-linked and conductive polystyrene
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Positronium yields in amorphous, cross-linked and conductive polystyrene
چکیده انگلیسی

Variations in positronium yields due to positron irradiation of specimens during experiment were investigated on the three commercially available modifications of polystyrene (Goodfellow): amorphous, cross-linked and conductive. Positron lifetime technique was employed. The variations of the positronium yields were expressed as changes of the ortho-positronium intensity as functions of the irradiation time. It was found that the positronium yield curves obtained for the amorphous and cross-linked polystyrene cannot be represented as a simple single-exponential relaxation towards a steady state and at least one additional component or a modified shape of the relaxation curve should be considered.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 76, Issue 2, February 2007, Pages 180–184
نویسندگان
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