Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 11: Nuclear Astrophysics II
HK 11.1: Gruppenbericht
Montag, 14. März 2016, 16:30–17:00, S1/01 A02
Constraining nuclear physics input-parameters for the synthesis of heavy elements via cross-section measurements of charged-particle induced reactions — •Philipp Scholz, Felix Heim, Jan Mayer, Lars Netterdon, and Andreas Zilges — Institute for Nuclear Physics, University of Cologne
Nuclear physics plays an important role in the nucleosynthesis of elements in stars. Especially for the production mechanisms of heavy elements in the γ process, the rapid proton-capture process or the weak r-process, cross sections are calculated in the scope of the Hauser-Feshbach statistical model. The obtained values crucially depend on input-parameters like the γ-ray strength functions or particle+nucleus optical-model potentials.
Constraining or excluding different adopted models for these nuclear physics input-parameters is achieved by precise cross-section measurements and their comparison to theory. During the last years, different charged-particle induced reaction cross sections at sub-Coulomb energies have been measured in Cologne by means of either the in-beam method with HPGe detectors or the actiation technique.
This talk is going to present the experimental setups as well as recent results for the 92Mo(p,γ) and 98Ru(α,γ) reactions and α-induced reactions on 108Cd.
Supported by the DFG (INST 216/544-1) and the "ULDETIS" project within the UoC Excellence Initiative institutional strategy. P.S. and J.M. are supported by the Bonn-Cologne Graduate School for Physics and Astronomy.