Neutron [660]1/2 alignments in the odd–odd nucleus 154Tb

The experimentally observed four bands of 154Tb are analyzed in detail using the particle number conserving method for treating cranked shell model with monopole and quadrupole pairing interactions. Besides analyzing their behaviors at higher frequencies beyond the observed frequency range, we further predict the sixteen bands based on the low excited states in 154Tb. Our calculated results show that below the rotational frequency ℏω≈0.45 MeV, the νi13/2 and their interferences are responsible for all band crossings and above the frequency ℏω≈0.45 MeV, besides the νi13/2 orbitals, the π[660]1/2 and ν[505]11/2 orbitals begin to influence rotational alignments.