Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 5: Nuclear Astrophysics I

HK 5.8: Talk

Monday, March 27, 2017, 18:45–19:00, F 33

First results of total and partial cross-section measurements of the ¹⁰⁷Ag(p,γ)¹⁰⁸Cd reaction. — •Felix Heim, Julia Becker, Jan Mayer, Philipp Scholz, Mark Spieker, and Andreas Zilges — Institute for Nuclear Physics, University of Cologne

The γ process is assumed to play an important role in the nucleosynthesis of the majority of the p nuclei. Since the network of the γ process includes so many different reactions and - mainly unstable - nuclei, cross-section values are predominantly calculated in the scope of the Hauser-Feshbach statistical model. The values heavily depend on the nuclear physics input-parameters. The results of total and partial cross-section measurements are used to improve the accuracy of the theoretical calculations. In order to extend the experimental database the ¹⁰⁷Ag(p,γ)¹⁰⁸Cd reaction was studied via the in-beam method at the high-efficiency HPGe γ-ray spectrometer HORUS at the University of Cologne. Proton beams with energies between 3.5 and 5.0 MeV were provided by the 10 MV FN-Tandem accelerator. In this talk, first results on total and partial cross sections will be presented.

Supported by the DFG (ZI 510/8-1) and the "ULDETIS" project within the UoC Excellence Initiative institutional strategy. P.S. and J.M. are supported by the Bonn-Cologne Graduate School of Physics and Astronomy.