Speaker
Description
12C+12C fusion reaction rate is essential for explosional phenomena, such as X-ray superbursts and type Ia supernovae, and the evolution of massive stars. However, it has significant uncertainties in low-energy regions. Experimentally, the cross sections are tiny due to the thick Coulomb barrier. Theoretically, treatments of the rearrangement in the fusion reactions, in which alpha and p decay are dominant exit channels, are challenging. Extrapolations from higher energies, such as CF88, have been used for astrophysical simulations. Strong suppressions in low-energy regions called the hindrance model have also been proposed.
We evaluate the 12C+12C fusion reaction rate using a microscopic model, the antisymmetrized molecular dynamics. Using the model, we calculated the fusion cross sections treating coupling of the entrance (12C+12C) and exit channels (alpha+20Ne and p+23Na). We obtained resonances that enhance the fusion cross sections in low-energy regions, which rejects the hindrance model.
| Please select a main topic related to your abstract | Theoretical Nuclear Physics for Astrophysics |
|---|
