Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Nuclear Astrophysics VI
HK 45.1: Vortrag
Donnerstag, 13. März 2025, 14:00–14:15, SR 0.03 Erw. Physik
Activation experiment for cross-section measurements of proton-induced reactions around A=110 — •Benedikt Machliner, Martin Müller, Darius Schneider, Svenja Wilden, and Andreas Zilges — University of Cologne, Institute for Nuclear Physics, Germany
Understanding the nucleosynthesis of stable isotopes on the proton-rich side of the valley of stability, the so called p-nuclei, is subject of current research. Most reactions relevant for the p-process take place far away from the valley of stability. Hence, theoretical calculations for cross sections and reaction rates are crucial. In order to adjust and verify theoretical models, a wide database of experimental results is needed [1]. In the context of p-nuclei, the Cd/Sn region (A≈110) is of particular interest, as it contains seven p-nuclei (102Pd, 106Cd, 108Cd, 113In, 112Sn, 114Sn and 115Sn). To extend the experimental database in this mass region, the activation method is well suited. Using the University of Cologne’s 10 MV FN Tandem accelerator and the Cologne Clover Counting setup [2], proton-induced reactions on four cadmium isotopes, 102Pd, and 116Sn were performed at astrophysically relevant energies. The cross section results will be presented and a method of analyzing reactions applicable to nuclei with long-lasting metastable states in the reaction product will be laid-out.
Supported by the DFG (ZI 510/12-1)
[1] M. Arnould and S. Goriely, Progr. in Part. and Nucl. Phys. 112, (2020) 103766.
[2] F. Heim et al., Nucl. Instrum. Methods A 966 (2020) 163854.
Keywords: p-nuclei; activation