Emerging γ-soft-like spectrum in 196 Pt in the SU3-IBM (I)

Recently, studies have argued that a spherical-like spectrum emerges in the SU3-IBM, thus creating new approaches to understanding γ -softness in realistic nuclei. In a previous study, γ -softness with degeneracy of the ground and quasi- γ bands was observed. In this paper, another special point connected to the middle degenerate point is discussed. It is found to be related to the properties of 196 Pt. This emergent γ -softness is also shown to be important for understanding the prolate-oblate asymmetric shape phase transition. The low-lying spectra, values, and quadrupole moments in 196 Pt are discussed, and we show that the new model can account for several observed features. This is the first part of the discussion on the γ -soft-like spectrum of 196 Pt.