Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 58: Nuclear Astrophysics 4
HK 58.7: Vortrag
Donnerstag, 26. März 2015, 18:30–18:45, K/HS2
Neutrino Nucleosynthesis in Core-Collapse Supernoava explosions — •Andre Sieverding1, Lutz Huther1, Gabriel Martínez-Pinedo1, and Karlheinz Langanke2 — 1Insitut für Kernphysik, TU Darmstadt, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstatdt, 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.
7Li, 11B and 19F are produced by neutrino processes. Furthermore, we have explored the impact of ν-nucleosynthesis on the production of long-lived radioactive nuclei. Our calculations are based on modern simulations of neutrino spectra that turn out to predict substantially lower average neutrino energies than used in previous ν-nucleosynthesis studies. We explore the sensitivity to the neutrino spectra for a large set of solar metallicity progenitor models. 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 International Center for FAIR in the context of the LOEWE initiative and by the Helmholtz Association through the Nuclear Astrophysics Virtual Institute.