Constraining the 12C+12C fusion cross section for astrophysics

Bucher, B.; Fang, X.; Tang, X.D.; Tan, W.P.; Almaraz-Calderon, S.; Alongi, A.; Ayangeakaa, A.D.; Beard, M.; Best, A.; Browne, J.; Cahillane, C.; Couder, M.; Dahlstrom, E.; Davies, P.; DeBoer, R.; Kontos, A.; Lamm, L.; Long, A.; Lu, W.; Lyons, S.; Ma, C.; Moncion, A.; Notani, M.; Patel, D.; Paul, N.; Pignatari, M.; Roberts, A.; Robertson, D.; Smith, K.; Stech, E.; Talwar, R.; Thomas, S.; Wiescher, M.

Abstract

The 12 C+ 12 C reaction is one of the single most important nuclear reactions in astrophysics. It strongly influences late evolution of massive stars as well as the dynamics of type Ia supernovae and x-ray superbursts. An accurate estimation of the cross section at relevant astrophysical energies is extremely important for modeling these systems. However, the situation is complicated by the unpredictable resonance structure observed at higher energies. Two recent studies at Notre Dame have produced results which help reduce the uncertainty associated with this reaction. The first uses correlations with the isotope fusion systems, 12 C+ 13 C and 13 C+ 13 C, to establish an upper limit on the resonance strengths in 12 C+ 12 C. The other focuses on the specific channel 12 C+ 12 C→ 23 Mg+n and its low-energy measurement and extrapolation which is relevant to s-process nucleosynthesis. The results from each provide important constraints for astrophysical models.

Citation

Bucher, B., Fang, X., Tang, X., Tan, W., Almaraz-Calderon, S., Alongi, A., Ayangeakaa, A., Beard, M., Best, A., Browne, J., Cahillane, C., Couder, M., Dahlstrom, E., Davies, P., DeBoer, R., Kontos, A., Lamm, L., Long, A., Lu, W., Lyons, S., …Wiescher, M. Constraining the 12C+12C fusion cross section for astrophysics

• Presentation Conference Type: Conference Paper (published)
• Acceptance Date: Jun 5, 2015
• Online Publication Date: May 28, 2015
• Publication Date: 2015
• Deposit Date: Jun 28, 2018
• Publicly Available Date: Jul 13, 2018
• Journal: EPJ Web of Conferences
• Print ISSN: 2100-014X
• Publisher: EDP Sciences
• Peer Reviewed: Peer Reviewed
• Volume: 93
• Article Number: 03009
• Pages: 03009
• ISBN: 9782759817948
• DOI: https://doi.org/10.1051/epjconf/20159303009
• Public URL: https://hull-repository.worktribe.com/output/558419
• Publisher URL: https://www.epj-conferences.org/articles/epjconf/abs/2015/12/epjconf_cgs2015_03009/epjconf_cgs2015_03009.html
• Contract Date: Jun 28, 2018