کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5365427 | 1388330 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Depth-dependent positronium formation in γ-irradiated polymers after 30-month aging
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Depth-dependent positronium formation in γ-irradiated polymers after 30-month aging Depth-dependent positronium formation in γ-irradiated polymers after 30-month aging](/preview/png/5365427.png)
چکیده انگلیسی
Depth-dependent positronium (Ps) formation and annihilation study of Co-60 γ-irradiated polyethylene and polytetrafluorethylene were performed. After 30-month aging, no free radicals effect on Ps formation was detected for the studied polymers. Efficient trapping of back-diffusion positrons was observed in heavily irradiated samples, where Ps formation probability near polymer surface and in the bulk turns to be equivalent to each other. Results shown that positron annihilation Doppler broadening in polytetrafluorethylene is prevailingly influenced by high momentum electrons of fluorine atoms instead of Ps intensity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 1, 31 October 2008, Pages 205-208
Journal: Applied Surface Science - Volume 255, Issue 1, 31 October 2008, Pages 205-208
نویسندگان
R.S. Yu, X.P. Hao, Y.Y. Ma, P. Wang, X.B. Qin, Z. Zhang, B.Y. Wang, L. Wei, T. Suzuki, Y. Ito, V.P. Shantarovich,