Experimental and theoretical investigation of the ¹³C+¹¹⁹Sn reaction dynamics

We report on the measurement and analysis of elastic scattering angular distributions for the ¹³ 13 C+ ¹¹⁹ 119 Sn system at two bombarding energies: 40.0 and 46.9 MeV. In addition, inelastic scattering and single-neutron transfer reactions were measured at 46.9 MeV. The data were obtained using the same experimental setup previously employed in the ¹² 12 C+ ¹¹⁹ 119 Sn study, allowing for a direct comparison. Optical model analyses were performed using the São Paulo potential for the real part of the interaction, while the imaginary part was treated both phenomenologically and via normalization of the real potential. Coupled-reaction-channels calculations were carried out, including couplings to inelastic excitations and one-neutron transfer channels. This approach yielded an improved description of the elastic scattering data across the full angular range for both energies. A direct comparison with the ¹² 12 C+ ¹¹⁹ 119 Sn results indicates that the additional neutron in ¹³C 13 C enhances absorption from the elastic channel. These findings highlight the sensitivity of near-barrier reaction dynamics to moderately bound valence nucleons and underscore the importance of coupling effects in accurately describing heavy-ion interactions.