Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Nukleare Astrophysik
HK 49.4: Vortrag
Donnerstag, 20. März 2014, 17:30–17:45, HZ 5
Sensitivity studies for the p process — •Kathrin Göbel1, Jan Glorius1, Alexander Koloczek1,2, Marco Pignatari3, René Reifarth1, René Schach1, and Kerstin Sonnabend1 for the NuGrid collaboration — 1Goethe-Universität Frankfurt am Main — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 3Universität Basel
Sequences of photo dissociations and β-decays during explosive conditions produce most of the p nuclei between 74Se and 196Hg (γ process). Some of the light p nuclei, e.g. the neutron magic isotope 92Mo, may also be synthesized by proton capture reactions, especially in thermonuclear supernovae.
Nucleosynthesis simulations require stellar models and a complete reaction network. The NuGrid collaboration has developed routines to post-process the nucleosynthesis depending on temperature and density profiles derived from stellar models. Seed distributions serve as input parameters to the simulations.
We show the influence of rate variations on the abundances of the light p nuclei in a 25 solar mass Supernova model and the effect of different seed distributions. Furthermore, we present the current status of our nucleosynthesis studies of the p process in thermonuclear supernovae.
This project was supported by the Helmholtz International Center for FAIR, DFG (SO907/2-1) and HGS-HIRe.
NuGrid acknowledges significant support from NSF grants PHY 02-16783 and PHY 09-22648 (JINA) and EU MIRG-CT-2006-046520.