Nuclear structure of 158,160Dy in the dynamic pairing-plus-quadrupole model and the shape phase transitions in 154-160Dy

The level structures and grouping into K-bands of 158Dy and 160Dy are calculated in the dynamic pairing-plus-quadrupole model. The analysis is extended to five K-bands with Iπ≤6+. The rise of the O2+ and O3+ states with N in 154-160Dy and the crossing of 2β over 2γ at 158Dy are reproduced. The calculated absolute E2 moments, relative B(E2) values for interband transitions and X(E0/E2) are compared with experimental data. (orig.)