L.C. Gomes

The deuteron optical potential in the adiabatic approximation

Abstract The deformation of the deuteron in the presence of a target nucleus is studied in the adiabatic approximation. Its effect on the deuteron optical potential is discussed. The contribution of deuteron break-up to this potential is also calculated.

The 12C+24Mg elastic scattering: An example of anomalous transparency at coulomb barrier energies

Abstract Fifteen complete angular distributions of the elastic scattering of 12 C+ 24 Mg were measured at energies around the Coulomb barrier ( E cm = 10.67–16 MeV). The angular distributions are strongly oscillating and could be well described by an optical potential family, whose real part was determined without continuous ambiguity. The imaginary part of this optical potential is very shallow. At four energies the inelastic scattering angular distributions leading to the 2 + state of the 24 Mg were also measured and analysed with coupled-channels calculations. The volume integrals of the optical potentials used in the coupled-channels calculations present the threshold anomaly in their energy dependence, with a clear Q -value dependence.

Experimental investigation of the ion-ion potential for the 16O + 60 Ni system at large interaction distances

Abstract Precise measurements of the elastic and inelastic scattering cross sections for the 16 O + 60 Ni system at the sub-barrier energies were made. Coupled channel analysis of the only two open channels were performed. The behaviour of the ion-ion potential at large distances is discussed.