Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Nuclear Astrophysics I

HK 11.3: Talk

Monday, March 28, 2022, 14:45–15:00, HK-H10

First results of total and partial cross-section measurements of the ⁸⁷Rb(p,γ)⁸⁸Sr reaction — •Svenja Wilden, Felix Heim, Martin Müller, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics, 50937 Cologne, Germany

The existence of most of thestable very neutron deficient nuclei - the p nuclei - cannot be explained via neutron-capture reactions. Therefore, at least one other process has to exist in order to describe their origin, the γ process. Since most photodisintegration reactions involved in the process are not directly accessible, reliable statistical model calculations are needed to predict cross sections and reaction rates. To improve the calculations the nuclear input parameters need to be constrained and a large experimental database is needed. Via comparison of experimental data to theoretical predictions different models can be excluded or constrained. In order to study the ⁸⁷Rb(p,γ)⁸⁸Sr reaction, for the first time an in-beam experiment at the high-efficiency HPGe γ-ray spectrometer HORUS at the University of Cologne was performed. Proton beams with energies between E_p = 2.0 − 5.0 MeV inside the Gamow window were provided by the 10 MV FN Tandem accelerator.

Supported by the DFG (ZI 510/8-2).