Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 52: Nukleare Astrophysik III
HK 52.7: Vortrag
Donnerstag, 24. März 2011, 15:45–16:00, C-2
Proton-induced reactions of astrophysical relevance at FRANZ — •Kerstin Sonnabend1, Michael Heil2, Oliver Meusel1, Ralf Plag1,2, and Rene Reifarth1 — 1Institut für Angewandte Physik, Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, 60438 Frankfurt — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt
The Frankfurt Neutron Source (FRANZ) is driven by a high-intense proton beam of several mA current with energies of about 2 MeV. These energies are well suited to investigate also proton-induced reactions of astrophysical relevance. (p,γ) and (p,n) reactions are important in very different stellar environments and nuclear mass regions. They occur on light nuclei below the iron region in advanced stellar burning stages – like oxygen and silicon burning – at temperatures below 1 GK. Furthermore, (p,γ) and (p,n) reactions contribute to the production of the neutron-deficient p nuclei in an explosive scenario reaching temperatures of several GK. Therefore, the proton energies provided at FRANZ will allow measurements near or in the corresponding Gamow energy windows of these different sites of nucleosynthesis.
The current status of the accelerator and the required amendments to use the proton beam directly for cross section studies are presented. In addition, the proposed experimental programme on proton-induced reactions of astrophysical interest will be summarized.
This project is supported by the HGF Young Investigator Project VH-NG-327.