Abstract

The behavior of rare-gas atoms in stainless steel after Ar, Kr and Xe ion irradiation has been investigated by means of glancing-angle X-ray diffraction, conversion electron Mössbauer spectroscopy, Rutherford backscattering spectroscopy (RBS) and particle-induced X-ray emission (PIXE). It has been shown by RBS and PIXE measurements that the retained amount of rare-gas atoms in stainless steel depends on the ion species, energy and fluence. In Kr and Xe ion irradiation, an increase in intensity and a decrease in position of Kr and Xe peaks with increasing ion energy and fluence have been observed. The pressure as estimated from the lattice parameter of Kr and Xe solids has been consistent with the occurrence of the ion-induced phase transformation ( γ-to-α phase) in stainless steel. We conclude that these results show the experimental evidence of the highly pressurized rare-gas inclusions formed in stainless steel.

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