Excitation functions and angular distributions of 58 Ni+ 58 Ni and 58 Ni+ 62 Ni scattering at energies just above the Coulomb barrier have been measured around θ cm = 90 • in energy steps ∆E cm = 0.25 MeV from E cm 110 MeV to E cm 120 MeV for 58 Ni+ 58 Ni and from E cm 110 MeV to E cm 118 MeV for 58 Ni+ 62 Ni. Evidence for structure of non-statistical character has been found in the angle-summed excitation functions; this evidence is corroborated by the analysis of the angular distributions. This is the first time that non-statistical structure in elastic and inelastic scattering is reported with high confidence level for this mass and excitation energy ranges. Attempts are presented to understand the nature of this structure, including the presence of intermediate dinuclear states and virtual states in a potential well.
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