Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 57: Nuclear Astrophysics V
HK 57.5: Vortrag
Donnerstag, 17. März 2016, 17:45–18:00, S1/01 A04
Recent results from the Penning-trap mass spectrometer ISOLTRAP — •Dinko Atanasov for the ISOLTRAP collaboration — Max-Planck Institute for Nuclear Physics
Precision mass measurements of the nuclides 129−131Cd have been performed by using the mass spectrometer ISOLTRAP at ISOLDE/CERN. Deviation of about 400 keV is found in the case of 130Cd compared to the previous nuclear studies in the same region. These new findings confirm and quantify the previous indications for the decrease of the shell closure below doubly magic 132Sn. Furthermore, 130Cd in a nuclear astrophysical context is a key nuclide, i.e. a classical waiting-point nuclide for the production of heavy nuclei through the rapid neutron-capture process. The results of the measurement campaign were used to theoretically study the nucleosynthesis by two different astrophysical scenarios, the neutrino driven wind of type-II supernovae and the compact object binary mergers, respectively. The astrophysical simulations result in direct and consistent impact on the Solar System abundance around A = 128 − 132 peak. In this contribution all measured masses will be presented and their influence on the nucleosynthesis discussed.