Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 287, Issue -, Pages 148-152Publisher
ELSEVIER
DOI: 10.1016/j.nimb.2012.04.013
Keywords
A508-3 steel; Ion irradiation; Slow positron beam
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Funding
- National Science and Technology Major Project [2011ZX06004-002]
- National High Technology Research and Development Program of China (863 Program) [2012AA050901]
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Proton irradiated A508-3 steel samples at room temperature were characterized by slow positron Doppler broadening spectroscopy to investigate the evolution of the irradiation-induced defects. S parameters of the irradiated samples were higher than those of the unirradiated samples. The S-W plot indicated that only one type of defect was presented in all the samples. These defects seem to be the vacancy-impurity complexes (associated with C, H, Mn or Ni) or divacancies. On the basis of the assumption that irradiation induced-defects consist of mono-vacancies, the concentration of these defects (similar to 10(20)/cm(3)) rapidly increases at the low dose (below about 0.15 dpa) and then tends to saturate at high dose (up to 0.35 dpa). (C) 2012 Elsevier B.V. All rights reserved.
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