München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Nuclear Astrophysics V

HK 60.1: Gruppenbericht

Freitag, 22. März 2019, 14:00–14:30, HS 16

Radiative charged-particle induced reaction studies for the nucleosynthesis of heavy isotopes — •P. Scholz, F. Heim, M. Körschgen, J. Mayer, M. Müller, and A. Zilges — Institute for Nuclear Physics, University of Cologne

Nuclear reaction cross sections are one of the main ingredients for the understanding of nucleosynthesis processes in stellar environments. For isotopes synthesized in the p- or r process [1,2], reaction rates on exotic nuclei are often calculated in the scope of the Hauser-Feshbach statistical model [3]. The accuracy of these reaction rates crucially depend on the uncertainties of nuclear-physics input-parameters like γ-ray strength functions, optical-model potentials, and level densities. The way to improve the reliability of statistical model calculations is to extend the available database for charged-particle induced reaction cross sections at low energies as well as using these data to study the underlying nuclear physics properties.

This talk will summarize the different projects of our group, measuring proton and α-particle induced reactions in different mass regions and studying the γ-ray strength functions and α+nucleus optical-model potential.

Supported by the DFG (ZI 510/8-1) and the "ULDETIS" project within the UoC Excellence Initiative institutional strategy.

M. Arnould and S. Goriely, Phys. Rep. 384 (2003) 1.

[2] M. Arnould et al., Phys. Rep. 450 (2007) 97.

[3] W. Hauser and H. Feshbach, Phys. Rev. 87, 366 (1952).