Recently published data for the elastic scattering of 70.5 MeV polarized ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ by ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ have been compared with the results of coupled-channels calculations. The diagonal and off-diagonal potentials used in the analysis were generated from phenomenological α + ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ and d→ + ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ optical potentials via the cluster-folding method. Examined were the effects of projectile excitation to the three low-lying T=0 resonant states and to nonresonant continuum states in the energy range 0.63 MeV–10.03 MeV, relative to the ${}_{}{}^6{}_{}{}^{}\mathrm{\alpha }$+d breakup threshold at 1.47 MeV. In common with earlier analyses, calculations limited to the resonant excited states reproduced the data only when the interaction and coupling potentials were renormalized. However, the inclusion of the nonresonant excited states removed the need for this renormalization. Calculations including both the resonant and nonresonant states yielded a description of the differential cross section data superior to that resulting from calculations limited to the resonant states even when the latter were performed with renormalized potentials. Calculations of the tensor analyzing powers reproduced the data well and favored a near zero value for the spectroscopic amplitude of the D-state admixture in the ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ ground state cluster wave function.

• Received 26 May 1995

DOI:https://doi.org/10.1103/PhysRevC.52.2614