Elastic scattering of ¹³C and ¹⁴C isotopes on a ²⁰⁸Pb target at energies of approximately five times the Coulomb barriers

The elastic scattering angular distributions of C-13 at 340 MeV and C-14 at 294 MeV and 342 MeV on a Pb-208 target, which correspond to approximately five times the Coulomb barriers, were measured at the Radioactive Ion Beam Line in Lanzhou. The data were analyzed within the optical model and continuum-discretized coupled-channels (CDCC) framework, and the results of both calculations could effectively account for the experimental data. The differential cross sections of elastic scattering revealed no particular suppression at the Coulomb nuclear interference peak angles, suggesting that the breakup coupling effects on the elastic scattering angular distributions were negligibly small in this incident energy region. The contributions from the couplings with inelastic states to the elastic cross sections were of minor importance within the angular range covered by these experiments.