Elastic Scattering of Neutron-Rich Helium Isotopes from Polarized Protons at 71 MeV/A

Abstract

Abstract. The vector analyzing power has been measured for the elastic scattering of neutronrich 6 He and 8 He from polarized protons at 71 MeV/A making use of a newly constructed solid polarized proton target operated in a low magnetic field of 0.1 T and at a relatively high temperature of 100 K. An optical model analysis revealed that the spin-orbit potentials for 6 He and 8 He are characterized by shallow and long-ranged shape compared with the global systematics of stable nuclei. Such a characteristics reflect a diffused density distribution of the neutron-rich isotopes.