Tanja Heftrich, Mario Weigand, Kafa Al-Khasawleh, Benjamin Brückner, Sophia Florence Dellmann, Ozan Can Dogan, Asmaa El Mard, Philipp Erbacher, Fabian Habermehl, Benedict Heybeck, Madeleine Margaux Gail, Kathrin Göbel, Timo Kisselbach, Cem Deniz Kurtulgil, Markus Reich, René Reifarth, Silas Sheriff, Meiko Volknandt
- About 50% of the elements heavier than iron are produced during the slow neutron capture process. This process occurs in different stellar sites at various energies. To understand the ongoing nucleosynthesis, the probability of a neutron capture for different temperatures and therefore for different stellar sites is essential. Activation experiments using the 7Li(p,n) reaction as neutron source were performed. At a temperature of kBT = 25 keV the cross sections were determined for 27Al, 37Cl and 41K. A new method was developed to perform activation experiments at even lower temperatures. For a proof of principle, the cross section for 64Ni was measured at kBT = 25 keV as well as for kBT = 6 keV. To study the impact of isomeric states at higher energies, activations of 181Ta were performed using two different proton energies.
