Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Nukleare Astrophysik
HK 21.2: Vortrag
Montag, 4. März 2013, 17:15–17:30, HSZ-403
Neutral current neutrino reactions in neutrino driven wind nucleosynthesis — •Lutz Huther1, Tobias Fischer1, Gabriel Martinez-Pinedo1,2, and Karlheinz Langanke1,2,3 — 1TU Darmstadt, Darmstadt — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 3Frankfurt Institute for Advanced Studies, Frankfurt
Neutrino driven winds in core collapse supernovae are considered as one of the sources for the creation of elements heavier than iron. The detailed nucleosynthetic results are sensitive to various parameters coming from core collapse supernovae simulations, especially the electron neutrino and antineutrino spectra. Depending on the energy difference the ejecta can be proton or neutron rich. Proton rich ejecta constitute the site for the νp-process, while in neutron rich ejecta the r-process can operate. Furthermore neutrinos can interact with the ejecta, exciting them above particle emission thresholds, therefore changing the nucleosynthesis. We have computed the neutrino induced particle evaporation reactions using a two step approach based on the compound picture. In the first step the compound nucleus is formed by neutrino neutral current inelastic excitation of the nucleus. The relevant cross sections are computed within the random phase approximation. In the next step we use a statistical code for the calculation of the different deexcitation channels including emission of p, n and α particles both in the parent and in the successive daughter nuclei. We have explored the impact on the nucleosynthetic outcome. This work is supported by the Deutsche Forschungsgemeinschaft through contract SFB 634.