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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Poster - Nukleare Astrophysik

HK 57.2: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 4.OG

In-beam Experiments for Nuclear Astrophysics at HORUS — •Jan Mayer, Janis Endres, Lars Netterdon, Anne Sauerwein, Philipp Scholz, and Andreas Zilges — Institut für Kernphysik, Universität zu Köln

The p process involves a large network consisting of about 20000 reactions on approximately 2000 nuclei. As only few experimental data are available, network calculations are based almost completely on reaction rates predicted by theoretical models. Accurate predictions depend on nuclear physics input, e.g., optical-model potentials. In-beam experiments aim at reactions resulting in stable as well as unstable nuclei which are mostly not accessible in activation measurements and, therefore, provide an important method to improve theoretical models. Additional information, e.g. partial cross sections, can also be obtained.

Located at the 10 MV tandem accelerator of the University of Cologne, the high-efficiency HORUS γ-ray spectrometer provides excellent opportunities to improve the experimental situation on charged particle induced reactions relevant for the p process. The experimental setup features a reaction chamber equipped with multiple current readouts, a cooling trap, and a detector for Rutherford-Backscattering Spectrometry. First experiments on ⁸⁹Y have successfully been performed and preliminary results are presented.

Supported by the DFG (Zi 510/5-1). J.M., A.S., and P.S. are members of the Bonn-Cologne Graduate School of Physics and Astronomy.