Bochum 1998 – scientific programme
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HK: Hadronen und Kerne
HK 53: Nuclear Astrophysics IV
HK 53.2: Talk
Wednesday, March 18, 1998, 14:30–14:45, G
Strangeness in the nucleon and its influence on the outcome of the r-process — •Edwin Kolbe1, Karlheinz Langanke2, and Friedrich-Karl Thielemann1 — 1Departement für Physik und Astronomie der Universität Basel — 2Institute of Physics and Astronomy, University of Aarhus
Neutrino induced transmutation of nuclei will play an important role in at least two acts of a Type II supernova spectacle. First, in the hot, neutron-rich bubble, an intense neutrino flux could affect the outcome of the r-process by spallation of neutron-rich nuclei after the freeze-out. Second, by scattering on the (heavy) elements in the overlying shells of the pre-supernova star, a significant amount of rare isotopes can be produced (so called neutrino-nucleosynthesis). Furthermore it has been shown that a strange quark contribution to the nucleon affects the cross section for neutrino-induced knockout of nucleons via a neutral current reaction on nuclei. Hence strangeness in the nucleon should influence the outcome of the r-process and neutrino-nucleosynthesis, which is studied here.