Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 67: Nuclear Astrophysics VI
HK 67.3: Vortrag
Freitag, 18. März 2016, 14:45–15:00, S1/01 A02
Neutrino-induced nucleosynthesis in Core-Collapse Supernovae — •Andre Sieverding1, Gabriel Martínez-Pinedo1,2, and Karlheinz Langanke2 — 11 Institut für Kernphysik (Theoriezentrum), Technische Universit*at Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany — 2Gesellschaft für Schwerionenforschung Darmstadt, Planckstr. 1, D-64259 Darmstadt, Germany
We study influence of an extensive set of neutrino induced reactions on nucleosynthesis calculations for the outer layers of supernovae. We use cross sections calculated for almost the whole nuclear chart including multi-particle evaporation. Some of the critical cross-sections e.g. for 26Mg, could be constrained by experimental data. We explore the sensitivity to the neutrino spectra and stellar structure for a large set of solar metallicity progenitor models.
Our studies confirm the fact that 7Li, 11B and 19F, 138La and 180Ta are produced by neutrino processes. However, calculations with neutrino spectra consistent with state-of-the-art Supernova simulations predicting substantially reduced average energies, we find a significant reduction of the yields of these nuclei.
Despite the lower neutrino energies we find significant contributions of neutrino-nucleosynthesis for the production of 26Al and 22Na.
This work is supported by the Helmholtz Association through the Nuclear Astrophysics Virtual Institute and by the Helmholtz International Center for FAIR in the context of the LOEWE initiative.