New γ-soft rotation in the interacting boson model with SU(3) higher-order interactions

The interacting boson model with S U(3) higher-order interactions offers a new route to enhance our understanding onγ-soft rotation.In this paper, U(5) -like and O(6) -like newγ-softness are observed,in which the corresponding energy levels in the ground and quasi-γbands can be exactly degenerate and have a partial O(5) dynamical symmetry.The spherical-likeγ-softness is not related to the classical O(6) dynamical symmetry.The transitional behaviors of B(E2) values of the low-lying levels and quadrupole moment of the 2^(+)_(1) state are also discussed.Spherical-likeγ-softness can be used to explain the low-lying spectra and B(E2) values in ^(110)Cd normal states.