Band structure inRe180and the different coupling schemes in a deformed doubly odd nucleus

Rotational bands in the odd-odd nucleus ${}_{}{}^{180}{}_{}{}^{}\mathrm{Re}$ have been studied via the ${}_{}{}^{176}{}_{}{}^{}\mathrm{Yb}$ ${(}^{10}$B,6n) and ${}_{}{}^{181}{}_{}{}^{}\mathrm{Ta}$(α,5n) fusion-evaporation reactions. A completely new high-spin level scheme has been obtained comprising four ΔI=1 bands and a ΔI=2 band. The ΔI=1 structures can be understood from quasiparticle states in neighboring odd nuclei and the ΔI=2 band is interpreted as a new example of a double decoupled sequence based on the decoupled $h_{9/2}$ proton and a ${(1/2\mathrm{}}^{\mathrm{-}}$[521] neutron. The different coupling schemes in a deformed doubly odd nucleus are discussed.