Microscopic optical potential of nucleus-nucleus elastic scattering

Microscopic optical potential of nucleus-nucleus interaction is presented by a folding method with the isospin-dependent complex nucleon-nucleus optical potential, which is calculated in the framework of theDirac-Bruecker-Hartree Fock approach. A local density and improved local density approximations are adopted to make the potentials in nuclear matter relevant to finite nuclei. The (4)He scattering off (12)C at various energies E < 200 MeV are studied first. Then the elastic scattering data of (6)He at 229.8 MeV on (12)C target are analyzed within the standard optical model. To take account of the breakup effect of (6)He in the reaction a phenomenological, large enhancing factor on the imaginary potential is introduced by hand. The calculated (6)He+(12)C elastic scattering differential cross section is in reasonable agreement with the experimental data. Meanwhile comparisons with results in the double-folded model based on M3Y nucleon-nucleon effective interaction and the few body Glauber-model calculations are discussed. Our model should be of value in the description of the nucleus-nucleus scattering, especially unstable nucleus nucleus systems.