Sub-barrier fusion of the magic nuclei 40,48Ca+48Ca -: art. no. 011601

The fusion excitation functions of Ca-40,Ca-48+Ca-48 have been measured near and below the Coulomb barrier and the fusion barrier distributions have been extracted from the data. The cross sections for Ca-48+Ca-48 are well reproduced by coupled-channels (CC) calculations, including inelastic excitations to the 2(+) and 3(-) states of both nuclei and using a standard potential. The cross sections of Ca-40 + Ca-48 are significantly larger than Previous data for the same system, especially near and above the barrier. While a much better agreement between present data and CC calculations is found in that energy range, the sub-barrier cross sections are still underpredicted.