Gyromagnetic ratios of low-lying excited states in the even 192-198Pt isotopes; experimental measurements and theoretical predictions

The gyromagnetic ratios of the 22+ and 41+ states in 196Pt were measured relative to that of its 21+ level. The thin-foil IMPAC technique was employed utilizing the enhanced transient hyperfine magnetic field present at the nuclei of swiftly recoiling ions traversing magnetized ferromagetic materials. The states of interest were populated by Coulomb excitation using beams of 220-MeV 58Ni ions. For g(21+) taken as 0.326+-0.014, the present measurements yielded g(22+) = 0.30+-0.06 and g(41+) 0.30+-0.05. These results and those reported by prior workers for the g-factors of corresponding levels in 192Pt, 194Pt, 198 Pt are used to trace the systematics of the magnetic moments of these low-lying levels in the even 192-198Pt isotopes. Interacting Boson Approximation model-based calculations of the g-factors of these states were also carried out. The experimental theoretical results are compared