PROTON-SCATTERING BY HE-8 AND NEUTRON HALO EFFECTS

The existing experimental data on He-8+p elastic and inelastic scatter ing at low and high energies have been analyzed in terms of an eikonal approach with different presentations of nuclear density distribution s. Comparison of calculations with experimental data reveals a sensiti vity of recoil proton angular distribution at large momentum transfer to the shape of matter distribution. The root-mean-square radius of He -8 has been deduced and effects of neutron halo in He-8 are discussed.