Roles of folding spin-orbit potentials in 6,7Li scattering

Spin-dependent interactions responsible for vector analyzing powers in elastic scattering of 6,7Li are investigated with a special interest in the competition between folding spin-orbit potentials and higher orders of tensor interactions including projectile virtual excitations. For 150 > approx Elab > approx 40 MeV, they are both important. For Elab < approx 20 MeV, however, the folding spin-orbit potential cannot be effective because the attenuation due to the projectile excitation and/or the Coulomb barrier prevent the projectile from intruding into the spin-orbit effective area. (author)