Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Nuclear Astrophysics III

HK 37.1: Gruppenbericht

Mittwoch, 13. März 2024, 15:45–16:15, HBR 14: HS 1

Cross-section measurements at the HORUS γ-ray spectrometer and the Cologne Clover Counting setup — •Martin Müller, Felix Heim, Benedikt Machliner, Svenja Wilden, Pina Wüstenberg, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics, Germany

The detailed modeling of nucleosynthesis networks requires a vast amount of information on nuclear properties that is not available from experiments. Instead, theoretical calculations are required to predict quantities like masses, lifetimes, and reaction cross sections far away from stability [1]. To make these calculations reliable, theoretical models have to be thoroughly tested and adjusted to experimental data. In order to provide high precision data, especially on the proton rich side of the nuclear chart relevant to the astrophysical γ process, the University of Cologne operates the HORUS γ-ray spectrometer for in-beam spectroscopy and the Cologne Clover Counting setup for activation experiments [2]. While the latter method is limited by the lifetime of the reaction products, a technique using decay chains can be applied. Time resolved decay curves enable the disentanglement of cross sections associated with the production of a nucleus in its ground state and a metastable state. Combining in-beam and activation experiments opens up a broad range of reactions to investigation through which theoretical models can be constrained. Supported by the DFG (ZI 510/8-2).

[1] M. Arnould et al., Prog. Part. Nucl. Phys. 112 (2020) 103766.

[2] F. Heim et al., Nucl. Instrum. Methods A 966 (2020) 163854.

Keywords: p-nuclei; gamma-process