Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Nuclear Astrophysics I

HK 11.1: Gruppenbericht

Montag, 28. März 2022, 14:00–14:30, HK-H10

The explosive nucleosynthesis of proton-rich nuclei mimicked in the laboratory — •Felix Heim, Martin Müller, Svenja Wilden, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics

The universe was born with just hydrogen, helium and small traces of lithium. Most of the heavy nuclei beyond the iron-peak region are created by neutron-capture processes. A group of 30 to 35 proton-rich stable isotopes however, is shielded against these processes. These p nuclei are most likely produced in explosive stellar scenarios by the astrophysical γ process, which is a complex network of thousands of nuclear - mostly photodisintegration - reactions on stable and unstable nuclei. At present, most of the reactions rates involved are taken from theory in the framework of the Hauser-Feshbach model. Therefore, the extension of the experimental database of measured cross sections is one of the tasks of nuclear laboratories. Also, experimental data are required to constrain the nuclear physics parameters entering the theoretical calculations and to test their predictive power. In this contribution, details of the experimental setup and techniques will be presented that are used to measure nuclear reactions relevant for the nucleosynthesis of the p nuclei. In addition, emphasis will be put on studies of the underlying nuclear physics properties.
Supported by the DFG (ZI 510/8-2).