Differential cross sections for elastic and inelastic ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ scattering from ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ at $E_{\mathrm{c}.\mathrm{m}.\mathrm{}=16\mathrm{}}$ and 20 MeV, and scattering from ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ at 18.7 MeV were measured out to ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}\mathrm{\approxeq }170}$°. Also by scattering ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ from ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, the inelastic cross sections for the excitation of the $3^{+}$ (2.18 MeV) and the $2^{+}$ (4.31 MeV) states of ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ and an estimate of the continuum inelastic cross sections of ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ were determined. The inelastic data were analyzed using the distorted-wave Born approximation and coupled-channels techniques with folded real and phenomenological imaginary form factors, with the deformations derived from electron scattering. The inelastic data are well described. Coupled-channels effects due to the $3^{+}$ state of ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ were found to play an important role in the scattering. The inclusion of the $3^{+}$ state in the coupled-channels calculations reduced the discrepancy in the normalization of the real double-folded potential between ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ and other heavy-ion projectiles, and the imaginary potential became weaker in the surface region. The present results show that L=2 coupling in the elastic scattering is very important and that the source can be a state in either the projectile, the target, or both.

• Received 25 September 1984

DOI:https://doi.org/10.1103/PhysRevC.31.879