Reorientation and breakup effects in polarized Li-7+C-12 elastic scattering - art. no. 014606

A complete set of analyzing powers has been obtained for C-12((7)(Li.) over bar Li-7) C-12 elastic scattering at a bombarding energy of 34 MeV. Optica l model calculations using standard forms for the spin-orbit and tensor pot entials are unable to simultaneously describe all the available data. Howev er, coupled-discretized-continuum-channels (CDCC) calculations using cluste r-folding model form factors provide a reasonable overall description of th e. data with only two adjustable parameters. Reorientation effects are extr emely important in obtaining a good description of the analyzing powers, wi th the reorientation coupling of the Li-7 ground state being a major contri butor to all the analyzing powers and the main source of the second-rank te nsor analyzing powers T-20. T-21, and T-22. The failure of optical model ca lculations to describe the second rank data implies that the effect of this reorientation coupling cannot be described accurately by means of a dynami c polarization potential constrained to be of the standard forms. The CDCC calculations also demonstrate the effect of coupling to the alpha -t contin uum on the analyzing powers.