“…The only other possible particle distribution producing positive parity states is, when the two proton holes are placed in the 2p 1/2 orbital, making up for a 0 Using the concept that most nuclei exhibit some softness and, consequently, exhibit a tendency for deformation (be it static as for strongly deformed nuclei, or, in a dynamic way for soft nuclei in transitional regions and near to closed shells), any excited state is prone to be described using collective modes of motion (rotation, shape oscillations), implying that a nuclear shape is not a net "observable". Although the magnitude of the overall nuclear deformation β remains a well defined variable, the uncertainty in the nuclear shape γ (which can be quantified by calculating the variance, defined as σ( Q 3 ) ≡ Q 6 − ( Q 3 ) 2 (see also references [81,94,97])) is in general increasing with the increasing nuclear spin. Thus we do not consider γ values of other states than 0 + 1 , though they could in principle be calculated from the shell-model results.…”