Effect of smeared He-4-core in He-6+p elastic scattering

The elastic scattering data of p+He-4,He-6, available in the 40A-45A MeV en ergy range have been analyzed in a microscopic framework using an isospin, density and momentum-dependent finite-range effective interaction in a sing le folding model. The folded potentials explain the p+He-4 angular distribu tion data. For He-6, several density prescriptions of varied rms radii are employed. All these prescriptions lead to almost same fit to the He-6 + p e lastic angular distribution data with slight variations of the imaginary st rength. Microscopic calculations assuming proton scattering from the smeare d He-4-core in He-6, ignoring the halo, can also reproduce the experimental data if the strength of the imaginary part of the microscopic potential is enhanced. Implications of these results are discussed.