Abstract
Samples of polycrystalline iron and austenitic stainless steel were implanted with 250 keV Na + ions to a dose of 1.5 × 10 17 ions/ cm 2. The Na content was depth-profiled with the resonant nuclear reaction 23 Na( p, γ) 24 Mg, after the samples had been isochronally annealed between room temperature and 1060°C. In both matrices a diffusion process of Na atoms towards the surface was observed which is discussed in the light of results on Na diffusion in other metals (Cr, Ni and Mo).
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