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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.