Precise elastic scattering differential cross sections have been measured for the ${}^{12}\mathrm{C}{+}^{58}\mathrm{Ni}{,}^{208}\mathrm{Pb}$ systems at sub-barrier energies. The corresponding bare potentials have been determined at interaction distances larger than the respective barrier radii, and the results have been compared with those from an early extensive systematics for the nuclear potential. The present data have been combined with others for the ${}^{12}\mathrm{C}{+}^{12}\mathrm{C}{,}^{208}\mathrm{Pb}$ systems at intermediate energies, in order to extract the ${}^{12}\mathrm{C}$ ground-state nuclear density through an unfolding method.

• Received 14 December 2001

DOI:https://doi.org/10.1103/PhysRevC.65.044314