Formation of hydrogen-induced vacancies during growth of the Fe layer studied by slow positron beam

The positron annihilation lifetimes by slow positron beam are measured in the thin Fe films, which are grown under the hydrogen pressures 5.0×10−10 and 4.5×10−7 Torr, in positron-incident energies 2 and 3 keV. We have suggested experimentally the presence of hydrogen-induced vacancies in thin Fe films.