Application of Positron Microprobe for Nuclear Materials |
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| Journal | Materials Science Forum (Volume 607) |
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| Volume | Positron and Positronium Chemistry |
| Edited by | S. J. Wang, Z. Q. Chen, B. Wang and Y. C. Jean |
| Pages | 266-268 |
| DOI | 10.4028/www.scientific.net/MSF.607.266 |
| Citation | Masaki Maekawa et al., 2008, Materials Science Forum, 607, 266 |
| Online since | November, 2008 |
| Authors | Masaki Maekawa, Atsuo Kawasuso, Tetsuya Hirade, Y. Miwa |
| Keywords | Positron Microbeam, Stainless Steel (SS), Stress Corrosion Cracking, Vacancy Defects |
| Abstract | 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. |
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