https://doi.org/10.1051/epjconf/202329003003
Populating α-unbound states in 16O via 19F (p, αy)16O reaction
1 Instituto de Estructura de la Materia, CISC, Serrano 113bis, E-28006 Madrid, Spain
2 Grupo de Física Nuclear, Facultad de CC. Físicas, Universidad Complutense de Madrid, CEI Moncloa, 28040 Madrid, Spain
3 Department of Physics and Astronomy, University of Aarhus, DK-8000, Aarhus, Denmark
* e-mail: vicente.garcia@csic.es
Published online: 8 December 2023
The 12C(α, y)16O reaction is important in the production of universal 16O, but its cross-section at the relevant energies of static helium burning is complex and uncertain. The total cross-section originates from a sum of resonance tails and direct captures, making the contributions of sub-threshold states difficult to estimate. One proposed method to estimate these contributions involves determining relevant reduced α-widths of the sub-threshold states through indirect measurements. Therefore, 19F(p, αy)16O reaction was used to populate α-unbound states in 16O using a 2.6 MeV proton beam on a CaF2 target. A detection system consisting of single and telescope configurations of Si detectors was used to detect 2α-particles and a 12C particle in coincidence. Scintillator detectors were included in the setup to study the de-excitation of the states populated in 16O to the ground state. Under good event conditions a preliminar indentification of the particles detected has been conducted.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
