Gamma-ray spectroscopy of the doubly-odd nuclide Re

The near-stable nucleus 18475Re has been studied using the 180Hf(7Li, 3n)184Re reaction at 30 MeV. Prior to this work, a number of low-spin structures were known following transfer reaction experiments, but only three γ-ray transitions had been observed following the decay of a t1/2=169 day, 8(+) state. An extensive level scheme has been constructed from the present data, including states de-exciting through the Kπ=8(+) isomer and the Kπ=8(+) rotational band. Configurations are assigned with the aid of gK−gR values and the comparison of energies with predictions of blocked BCS calculations. Finally, residual nucleon–nucleon interactions for orbitals in this region are collated.