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HK: Fachverband Physik der Hadronen und Kerne

HK 62: Nuclear Astrophysics V

HK 62.4: Talk

Thursday, March 14, 2024, 16:45–17:00, HBR 14: HS 4

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

The existence of the p nuclei – a set of stable proton-rich nuclei – cannot be explained by neutron-capture processes [1]. Therefore, another mechanism must come into play, namely photodisintegration reactions, giving rise to the γ process. Since many photodisintegration reactions are not accessible trough experiments, statistical model calculations play a crucial role in predicting reaction rates and cross sections.

To study the ⁸⁷Rb(p, γ)⁸⁸Sr reaction, an in-beam experiment was performed at the high-efficiency HPGe γ-ray spectrometer HORUS at the University of Cologne. The 10 MV FN Tandem accelerator provided proton beams between E_p = 2 and 5 MeV. For six proton-beam energies cross-sections values were determined. These first experimental cross-section values for the ⁸⁷Rb(p, γ)⁸⁸Sr reaction help to constrain the nuclear physics input for statistical model calculations.

[1] T. Rauscher et al., Rep. Prog. Phys. 76 (2013) 066201.

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

Keywords: Nukleare Astrophysik; gamma-process