Evidence for ion beam induced attenuations of the static hyperfine field at recoil implanted 56Fe ions in Fe host

Abstract

Measurements of transient (TF) and static (SF) magnetic hyperfine fields at 56Fe(2 +) ions, implanted in Fe host after Coulomb excitation using 16O- and 56Fe-beams, exhibit attenuations of the SF strength which is shown for the first time to be primarily due to the effect of the ion beam and only secondarily to that of the recoil ion. The beam induced attenuation is of the same nature and magnitude as for TF, which has been determined in former measurements. It must therefore arise from the depolarization of the Fe 3d electrons resulting from the ion stopping. The effect of the recoil implanted ion may be attributed to a thermal spike which seems to be more efficient for heavier probe ions.