کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4921093 | 1429333 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Positron annihilation lifetime studies of stainless steel under proton and Xe irradiation
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
Specimens of stainless steel reactor internals were irradiated with 240Â keV protons and 6Â MeV Xe ions up to 15Â dpa. The positron annihilation lifetime spectroscopy (PLS) was carried out to study the development of vacancy-type defects. It is indicated that positrons are trapped by vacancies, vacancy clusters and other defects (precipitate, dislocations). The short lifetime parameter Ï1 decreases when specimens are irradiated to 2Â dpa by proton, whereas in the case of Xe irradiation, Ï1 decreases when specimens are irradiated to 7Â dpa. The positron annihilation at small cluster with H atoms (for H irradiation) and precipitated phase (for Xe irradiation) may explain this transition. The long lifetime parameter Ï2 increases continuously with damage increase. Compared with Xe irradiated specimens, a larger Ï2 is obtained in proton irradiated specimens at the same damage. The gas atoms-vacancies, which are expected to be the early state of H bubbles, will develop into small bubbles with the increase of irradiation damage and thus cause long lifetime parameter increase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volume 120, July 2017, Pages 34-38
Journal: Fusion Engineering and Design - Volume 120, July 2017, Pages 34-38
نویسندگان
Chaoliang Xu, Guodong Zhang, Wangjie Qian, Jinna Mei, Xiangbing Liu, Chengtao Li, Fei Xue, Jinyu Li, Huiping Liu,