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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Nuclear Astrophysics I
HK 5.4: Vortrag
Montag, 27. März 2017, 17:45–18:00, F 33
Explosive Nucleosynthesis in 2D Core-Collapse Supernovae and the Origin of the p-Nuclei 92,94Mo and 96,98Ru — •Marius Eichler — Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Deutschland
Core-collapse supernovae (CCSNe) are the first polluters of heavy elements in the galactic history. As such, it is important to study the nuclear compositions of their ejecta, and understand their dependence on the progenitor structure (e.g., mass, compactness, metallicity). Here, we present a detailed nucleosynthesis study based on two long-term 2D CCSN simulations of a 11.2 M⊙ and a 17.0 M⊙ star. We find that in both models nuclei well beyond the iron group nuclei can be produced, and discuss in detail the nucleosynthesis of the p-nuclei 92,94Mo and 96,98Ru. While we observe the production of 92Mo and 94Mo in slightly neutron-rich conditions in both simulations, 96,98Ru can only be produced efficiently via the νp-process. This disentanglement of production mechanisms has interesting consequences when comparing to the abundance ratios between these isotopes in the solar system and in presolar grains.