Spectral features of Mo isotopes

The sharp shape phase changes with increasing N of the A = 100–110 Mo isotopes, as associated with the deformed N = 60 shape turning point of the structure, are studied. In terms of the shape change with proton number Z, the Mo isotopes lie in between the Sr, Zr and Ru, Pd chain of isotopes. We have analyzed the special spectral features of these Mo isotopes through the energy level structures, in ground state bands, the K^π = 2⁺ and K^π = 4⁺ excited bands empirically. The unique features of the association of triaxiality, along with the rotational bands, are well illustrated. The interacting boson model (IBM-1) is used to reproduce the level structures of the Mo isotopes. An in-depth analysis of the spectral features of the Mo isotopes is presented. There is emphasis on the physics of the shape transitions.