Köln 2025 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 53: Nuclear Astrophysics VII
HK 53.1: Group Report
Thursday, March 13, 2025, 15:45–16:15, SR 0.03 Erw. Physik
Activation experiments for nuclear astrophysics — •Martin Müller, Benedikt Machliner, Darius Schneider, Svenja Wilden, and Andreas Zilges — University of Cologne
Nuclear astrophysics is a highly interdisciplinary field and the modelling of nucleosynthesis processes requires input from all of its constituents. On the nuclear physics site, reaction rates and cross sections rank among the most important inputs, especially for p-process calculations. This is primarily due to the fact, that in the vast reaction networks that make up the γ process, different reaction channels can compete with each other at many different branching or deflection points. In order to improve the underlying models used to calculate cross sections - typically within the Hauser-Feshbach statistical model - even for nuclei far away from stability, a large experimental database is needed to test and adjust theoretical models. One of the most effective techniques in building these databases throughout the last decades has been the activation method. In this work, recent experiments performed using the activation method as well as the stacked target technique to determine cross sections for both α- and p-induced reactions will be presented. These will include 170,172Yb(α, γ), 170,172Yb(p, γ), 55Mn(α, (2)n), 58Fe(p, n), natDy(p, γ), and natDy(α, γ).
Supported by the DFG (ZI 510/12-1).
Keywords: p-process; activation