Disparity between the transient hyperfine fields for Pt and Os in Fe; an electron vacancy sharing interpretation

Abstract

Precessions of the 21+ states in198Pt and192Os have been measured in the enhanced transient hyperfine magnetic field acting on these nuclei as they recoiled through thin polarized cobalt foils. Two separate targets consisting of contiguous layers of198Pt and192Os electrodeposited on ∼1 μm and ∼4 μm Co foils were employed. The levels of interest were Coulomb excited by 80 MeV32S and 220 MeV58Ni beams and the precessions of the 21+→01+ γ-ray angular distributions in both nuclides were measured simultaneously. The results of these studies are compared with recently reported similar studies in which ions of188Os and194Pt recoiled through thin polarized Fe foils. It is concluded that (i) the transient field acting on Pt in Fe is singularly anomalous, and (ii) the recent contention that the g-factors of the 21+ states in the event Pt isotopes may be substantially lower than had been reported in the literature cannot be sustained. This transient field discontinuity is examined in terms of possible molecular orbital electron vacancy sharing between Pt and Fe. Show more