Gyromagnetic Ratios of Low-Lying Excited States in the Even exp 192 exp -198 Pt Isotopes; Experimental Measurements and Theoretical Predictions

摘要

The gyromagnetic ratios of the 2 sub 2+ and 4 sub 1+ states in exp 196 Pt were measured relative to that of its 2 sub 1+ 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 exp 58 Ni ions. For g(2 sub 1+ ) taken as 0.326+-0.014, the present measurements yielded g(2 sub 2+ ) = 0.30+-0.06 and g(4 sub 1+ ) 0.30+-0.05. These results and those reported by prior workers for the g-factors of corresponding levels in exp 192 Pt, exp 194 Pt, exp 198 Pt are used to trace the systematics of the magnetic moments of these low-lying levels in the even exp 192 - exp 198 Pt isotopes. Interacting Boson Approximation model-based calculations of the g-factors of these states were also carried out. The experimental theoretical results are compared. (Atomindex citation 12:626410)