EPJ Web Conf.
Volume 279, 2023Nuclear Physics in Astrophysics – X (NPA-X 2022)
|Number of page(s)||5|
|Published online||22 March 2023|
A new 12C+12C reaction rate: Impact on stellar evolution
1 Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
2 Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, CP 226, 1050, Brussels, Belgium
3 University of Strasbourg Institute of Advanced Studies (USIAS), Strasbourg, France
4 Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA
5 Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843, USA
6 Department of astronomy, University of Geneva, chemin Pegasi 51, 1290 Versoix, Switzerland
7 Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
* e-mail: email@example.com
Published online: 22 March 2023
Among the reactions driving stellar evolution during carbon burning, 12C + 12C fusion provides the key ingredients. This system reveals many resonances, but also regions with suppressed fusion cross-sections. The reaction was recently measured by the STELLA collaboration utilizing the gammaparticle coincidence technique for precise cross-section measurements reaching down to the Gamow window of massive stars. From the experimental data, reaction rates were determined by approximating a hindrance parametrization and by adding on top a resonance at the lowest measured energy. The impact of these reaction rates on the evolution of massive stars was explored with models of 12 and 25 M⊙ using the stellar evolution code GENEC, and a detailed study of the resulting nucleosynthesis with a 1454 elements network was performed. The sensitivity of the STELLA experimental cross-sections on the temperature range for C-burning for the stellar models studied were presented. The final abundances and their impacts on stellar evolution were discussed.
© The Authors, published by EDP Sciences, 2023
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