Application of positron microprobe for nuclear materials

摘要：

We have developed a positron microbeam using magnetic lenses based on the commercial scanning electron microscope. The minimum beam diameter was 1.9 μm on target. Two-dimensional image of S parameter was successfully obtained. Using this apparatus, S parameter distribution around the crack tip introduced by a stress corrosion cracking of a stainless steel was obtained. S parameter increases at the further region of the tip of the crack. This shows that vacancy type defects may be generated as crack precursor.

关键词： Positron microbeam Stress corrosion cracking stainless steel vacancy defects

作者: M.Maekawa A.Kawasuso T.Hirade Y.Miwa

作者单位: Advanced Science Research Center,Japan Atomic Energy Agency Watanuki 1233,Takasaki,Gunma Japan Nuclear Science and Engineering Directorate,Japan Atomic Energy Agency Tokai-mura 2-4,Naka-gun,Ibara

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 266-268

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）