Cluster structures observed in super(40)Ca from super(12)C+ super(28)Si scattering

We discuss evidences of strong cluster structures observed in nuclear reactions even at quite high excitation energies. The oscillatory angular distributions of the elastic scattering of the super(12)C+ super(28)Si system measured at 13 energies close to the Coulomb barrier were reproduced introducing in the scattering S-matrix additional Regge-pole form terms. These poles were interpreted as describing doorway states with super(12)C+ super(28)Si cluster structure in the composite nucleus super(40)Ca. The excitation energies of these states indicate that they can be part of a rotational band in super(40)Ca, together with similar states observed in the elastic scattering and alpha -transfer reactions of the super(16)O+ super(24)Mg system. We propose that the presently observed, largely deformed molecular band corresponds to the hyper-deformed band in super(40)Ca, which has been found in a new Nilsson-model-calculation, which predicts preference of the super(12)C + super(28)Si and super(16)O + super(24)Mg molecular structures, in accordance with our present results.