Eur. Phys. J. A (2022) 58: 102
https://doi.org/10.1140/epja/s10050-022-00751-5

Regular Article - Theoretical Physics

The role of inelastic couplings on the C+C fusion at sub-barrier energies

¹ Universidade de Sao Paulo, Instituto de Fisica, Rua do Matao, 1371, 05508-090, Sao Paulo, SP, Brazil
² Universidade de Sao Paulo, Instituto de Fisica, Av. Trab. Sao Carlense, 400, 13566-590, Sao Carlos, SP, Brazil

^a lgasques@if.usp.br

Received: 29 April 2022
Accepted: 24 May 2022
Published online: 6 June 2022

Abstract

The effect of inelastic couplings on the modified astrophysical -factor for C+C fusion reaction at sub-barrier energies is investigated using the Brazilian Nuclear Potential. The C excited states (2, 4.44 MeV; 3, 9.64 MeV; 2, 9.84 MeV; 2, 10.3 MeV; 2, 16.1 MeV; 1, 17.2 MeV and 2, 18.8 MeV) are included in the coupling scheme. We have also coupled the 0 Hoyle state ( = 7.65 MeV) to the 2. In our model, the fusion cross section is associated to the absorption arising from the imaginary potential. Many resonances presented at the sub-barrier data are fairly reproduced by our approach.