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HK: Fachverband Physik der Hadronen und Kerne
HK 62: Nukleare Astrophysik
HK 62.5: Vortrag
Freitag, 21. März 2014, 15:15–15:30, HZ 5
Important measurements using reactor technique in order to constrain the s-Process path — •Tanja Heftrich1, Sebastian Altstadt1, Jan Glorius1, Kathrin Göbel1, Michael Heftrich1, Franz Käppeler2, Claudia Lederer1, Marcus Mikorski1, Ralf Plag1, Rene Reifarth1, Stefan Schmidt1, Zuzana Slavkovska1, Kerstin Sonnabend1, Christian Stieghorst3, Mario Weigand1, Norbert Wiehl3, and Stephan Zauner3 — 1Goethe University Frankfurt, Germany — 2KIT, Germany — 3University of Mainz, Germany
About half of the heavy elements from iron to bismuth are synthesized during s process (slow neutron capture process) by a sequence of neutron captures and β-decays. The involved β-decay times are usually shorter than the competitive neutron capture times. The resulting s process path runs along the neutron-rich side of the valley of stability in the nuclear chart. An experimental determination of the involved neutron capture cross sections and half-lives is highly desired to reproduce the elemental abundances. Long-lived radioactive isotopes can be produced in reactor activation experiments to determine the β-decay half-lives. As shown at the example of 60Fe, the half-lives times of such isotopes might be more uncertain than currently estimated. An independent investigation is therefore highly desirable. We will present first measurements, and future opportunities for half-live measurements in reactor activation experiments. This project was supported by the HGS-HIRe, the HIC for FAIR, the HGF Young Investigator Project VH-NG-327 and the DFG SO907/2-1.