Backbending of Dy isotopes described with the neutron-photon IBA plus two-quasiparticle model

The formalism of the neutron-photon interacting boson model, extended to include two-quasiparticle excitations, is used in a study of the high spin states of 154,156,158Dy isotropes. Good agreement is obtained between the calculated energies and transition rates and the experimental results