Multiconfigurational Dynamical Symmetry Description of 40Ca Spectrum

The spectrum of the 40Ca nucleus is known experimentally in different regions of deformation and excitation energy. Its ground state is spherical, and in the low-energy region there are rotational bands corresponding to moderate deformation. Its superdeformed (SD) band is also well-established from gamma-spectroscopy, whereas for hyperdeformation (HD), some indications come from good-resolution heavy-ion resonances. Here we apply multiconfigurational dynamical symmetry (MUSY) for a unified description of this spectrum, including the SD and candidate HD states. This symmetry connects the shell, collective and cluster models; therefore, it provides us with the shape isomers of the nucleus, as well as its spectrum scattered along energy and reaction channels.