Darmstadt 2016 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 4: Nuclear Astrophysics I
HK 4.5: Talk
Monday, March 14, 2016, 15:15–15:30, S1/01 A02
Impact of (α,n)-reaction rate uncertainties on the nucleosynthesis in neutrino-driven winds — •Julia Bliss1, Almudena Arcones1,2, Fernando Montes3,4, and Jorge Pereira3,4 — 1Institut für Kernphysik, TU Darmstadt — 2GSI Helmholtzzentrum GmbH — 3National Superconducting Cyclotron Laboratory, Michigan State University, USA — 4Joint Institute for Nuclear Astrophysics
In neutrino-driven winds from nascent neutron stars, matter moves towards heavier nuclei, mainly via alpha capture reactions, especially (α,n)-reactions. In the absence of experimental information, the reaction rates are usually calculated with statistical Hauser-Feshbach models [1]. The predictive power of these models is uncertain, especially as one moves away from stability. Therefore, it is important to study the sensitivity of the nucleosynthesis to the theoretical uncertainty of those rates.
We will show that under some astrophysical conditions the reaction rate uncertainties can be critical for the nucleosynthesis.
[1] W. Hauser and H. Feshbach, Physical Review, 87: 366-373, 1952.
⋆ Supported by Helmholtz Young Investgator Group VH-NG-825 and SFB 1245.