Experimental measurement of the 12C+16O fusion cross sections at astrophysical energies

• Published in: EPJ Web of Conferences Vol. 178; p. 04008
• Main Authors: Fang, X, Tan, W P, Beard, M, deBoer, R J, Gilardy, G, Jung, H, Liu, Q, Lyons, S, Robertson, D, Setoodehnia, K, Seymour, C, Stech, E, B Vande Kolk, Wiescher, M, de Souza, R, Hudan, S, Singh, V, Tang, X D, Uberseder, E
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Les Ulis EDP Sciences 01-01-2018
• Subjects: Cross-sections; Statistical models; Stellar evolution
• ISSN: 2101-6275; 2100-014X
• DOI: 10.1051/epjconf/201817804008

The total cross sections of the 12C+16O fusion have been experimentally determined at low energies to investigate the role of this reaction during late stellar evolution burning phases. A high-intensity oxygen beam was produced by the 5MV pelletron accelerator at the University of Notre Dame impinging on a thick ultra-pure graphite target. Protons and γ-rays were measured simultaneously in the center-of-mass energy range from 3.64 to 5.01 MeV, using strip silicon and HPGe detectors. Statistical model calculations were employed to interpret the experimental results. A new broad resonance-like structure is observed for the 12C+16O reaction, and a decreasing trend of its S-factor towards low energies is found.