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HK: Fachverband Physik der Hadronen und Kerne
HK 24: Kern- und Teilchen-Astrophysik
HK 24.4: Vortrag
Dienstag, 11. März 2008, 12:15–12:30, 2B
Influence of Mass Uncertainties of Exotic Nuclei on the rp- and ν p-Process — •Timo Fleckenstein1, Hans Geissel1, Wolfgang Plass1,2, Christoph Scheidenberger1,2, Hendrik Schatz3, and Gabriel Martinez-Pinedo2 — 1Justus-Liebig-Universität Gießen — 2GSI Darmstadt — 3Michigan State University
The impact of mass uncertainties of proton-rich nuclei with A=80-105 on astrophysical observables, e.g. x-ray burst light-curves, production path and final chemical abundance produced in nucleosynthesis (rp- and ν p-) processes has been investigated. A database of mass measurements in the mass region A=80-135 since the last atomic-mass evaluation AME 2003 has been created. In addition, extrapolations have been done to hitherto experimentally unknown masses close to the proton dripline. In order to investigate the dependence of nucleosynthesis processes on mass uncertainties, a network-code for nucleosynthesis processes in a type II x-ray burst and for the nucleosynthesis processes in neutrino-driven proton rich winds of a supernova explosion have been applied. New waiting point nuclei have been found in the rp-process, and important key nuclei have been discovered for the ν p-process.