Sep 4 – 9, 2022
Europe/Zurich timezone

Activations for lower s-process temperatures

Sep 6, 2022, 6:00 PM
61/1-201 - Pas perdus - Not a meeting room - (CERN)

61/1-201 - Pas perdus - Not a meeting room -


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Tanja Heftrich


Heavy elements beyond iron are mainly synthesizing neutron capture reactions. The slow neutron capture process (s-process) is responsible for 50\,\% of the heavy elemental abundances. The corresponding neutron energies in the different astrophysical sites range from a few keV to about hundred keV. By using the activation technique, neutron capture reactions have been studied over the last decades at $k_{\text{B}}T=$ 25\,keV. The neutrons were produced by protons impinging on a lithium target via the reaction $^7$Li(p,n)$^7$Be. Neutrons are emitted within a 120 degree cone. With a modified approach, we measured neutron capture cross sections for lower s-process temperatures. With ring-shaped samples, a specific range of neutron emission angles is covered such that the neutron energy distribution corresponds to a Maxwell-Boltzmann distribution of $k_{\text{B}}T=$7.75\,keV. The new technique and first results will be presented.

Primary author


Benjamin Brückner (Goethe University Frankfurt) Sandra Borzek (Goethe University Frankfurt) Sophia Florence Dellmann (Goethe University Frankfurt) Philipp Erbacher (Goethe University Frankfurt) Madeleine Gail (Goethe University Frankfurt) Deniz Kurtugil (Goethe University Frankfurt) Rim Mourad (Goethe University Frankfurt) Markus Reich (Goethe University Frankfurt) Rene Reifarth (Goethe University Frankfurt) Tom Staab (Goethe University Frankfurt) Meiko Volknandt (Goethe University Frankfurt) Mario Weigand (Goethe University Frankfurt)

Presentation materials