Application of Positron Microprobe for Nuclear Materials

Abstract:

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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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Periodical:

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:

M. Maekawa et al., "Application of Positron Microprobe for Nuclear Materials", Materials Science Forum, Vol. 607, pp. 266-268, 2009

Online since:

November 2008

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$35.00

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