Precision Mass Measurements of 129–131Cd and Their Impact on Stellar 
Nucleosynthesis via the Rapid Neutron Capture Process

Atanasov, Dinko; Ascher, P.; Blaum, Klaus; Cakirli, R.B.; Cocolios, T.E.; George, Sebastian; Goriely, S.; Herfurth, F.; Janka, H.-T.; Just, O.; Kowalska, M.; Kreim, Susanne; Kisler, D.; Litvinov, Yuri A.; Lunney, D.; Manea, V.; Neidherr, D.; Rosenbusch, M.; Schweikhard, L.; Welker, A.; Wienholtz, F.; Wolf, Robert; Zuber, K.

doi:10.1103/PhysRevLett.115.232501

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Precision Mass Measurements of ^129–131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process

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Atanasov, Dinko
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Ascher, P.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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George, Sebastian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Kreim, Susanne
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
CERN;

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Kisler, D.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Litvinov, Yuri A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
GSI Helmholtzzentrum für Schwerionenforschung GmbH;

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Wolf, Robert
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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PhysRevLett.115.232501
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Citation

Atanasov, D., Ascher, P., Blaum, K., Cakirli, R., Cocolios, T., George, S., et al. (2015). Precision Mass Measurements of ^129–131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process. Physical Review Letters, 115(23): 232501. doi:10.1103/PhysRevLett.115.232501.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-30DF-E

Abstract

Masses adjacent to the classical waiting-point nuclide ¹³⁰Cd have been measured by using the Penning-trap spectrometer ISOLTRAP at ISOLDE/CERN. We find a significant deviation of over 400 keV from earlier values evaluated by using nuclear beta-decay data. The new measurements show the reduction of the N=82 shell gap below the doubly magic ¹³²Sn. The nucleosynthesis associated with the ejected wind from type-II supernovae as well as from compact object binary mergers is studied, by using state-of-the-art hydrodynamic simulations. We find a consistent and direct impact of the newly measured masses on the calculated abundances in the A=128–132 region and a reduction of the uncertainties from the precision mass input data.