Abstract
Damage depths in nickel and iron crystals after room temperature implantations were analyzed by means of a-particle channeling in a backscattering geometry. Argon, krypton and xenon ions were implanted with energies ranging between 80 and 150 keV. In agreement with the results for some other metals, the ratio of the damage depth and the projected range increases with ion mass. In the fcc metal nickel this relative damage range is always appreciably larger than unity, although not comparable with the extreme values found in copper and platinum. In the bcc metal iron, however, damage depths after argon implantation exceed the projected ranges by less than 50%. A possible mechanism for deep radiation damage, which seems to be more prominent in fcc metals, is discussed.
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