Abstract
The decay of one monolayer gold atoms at the nickel surface by bombardment with 5 keV Ar + ions at room temperature has been studied by means of the RBS technique. It is found that the gold concentration decreases bi-exponentially with increasing ion fluence. It is shown that the fast decay component gives the removal cross-section which is the summation of the desorption and the recoil-implantation cross-sections. The recoil-implantation cross-section is evaluated from the difference between the removal cross-section and the desorption cross-section obtained at a previous high-temperature experiment.
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