Probing reaction dynamics in ^12,13C+¹¹⁹Sn collisions

¹ Universidade de Sao Paulo, Instituto de Fisica, Rua do Matao, 1371, 05508-090, Sao Paulo, SP, Brazil.
² Departamento FAMN, Universidad de Sevilla, Apartado 1065, 41080 Sevilla, Spain

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .brauthor

Published online: 13 May 2026

Abstract

Elastic scattering of ¹²C and ¹³C projectiles on a ¹¹⁹Sn target was investigated at E_Lab = 46.9 MeV, corresponding to energies slightly above the Coulomb barrier. The measurements were performed at the Open Laboratory of Nuclear Physics and Applications (LAFNA), University of São Paulo, using the STAR silicon detection array. Angular distributions were analyzed within the optical model and coupled-reaction-channels frameworks, adopting the São Paulo potential as the real bare interaction. For both systems, the inclusion of inelastic and one-nucleon transfer couplings in the coupled-reaction-channels calculations provided a consistent description of the data. Comparison between the ¹²C and ¹³C systems revealed clear isotopic effects, indicating that the valence neutron in ¹³C enhances absorption from the elastic channel into non-elastic processes. These results contribute to a deeper understanding of coupling effects and nuclear structure influences in near-barrier heavy-ion reactions.