Application of Positron Microprobe for Nuclear Materials

Masaki Maekawa; Atsuo Kawasuso; Tetsuya Hirade; Y. Miwa

doi:10.4028/www.scientific.net/MSF.607.266

Paper Titles

Development of Positron Microbeam in AIST
p.238

Development of the Positron Facility at the Argonne National Laboratory’s 20 MeV Linac
p.243

Interlaboratory Comparison of Positron Annihilation Lifetime Measurements
p.248

Optimization of Positron Lifetime Spectrometer Using Monte-Carlo Simulation of the Detectors
p.251

4-Channel Digital Positron Lifetime Spectrometer for Studying Biological Samples
p.254

Advanced Algorithms for PALS Analysis of Self-Assembled Amphiphiles
p.257

A Novel Approach to the Interpretation of PAL Spectra in Glycerol
p.260

Guiding of a Slow Positron Beam with a Glass Capillary
p.263

Application of Positron Microprobe for Nuclear Materials
p.266

HomeMaterials Science ForumMaterials Science Forum Vol. 607Application of Positron Microprobe for Nuclear...

Application of Positron Microprobe for Nuclear Materials

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.