Precision Mass Measurements of $^Cd$-131$_129$ and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process

Atanasov, D. and Ascher, P. and Blaum, K. and Cakirli, R.~B. and Cocolios, T.~E. and George, S. and Goriely, S. and Herfurth, F. and Janka, H.-T. and Just, O. and Kowalska, M. and Kreim, S. and Kisler, D. and Litvinov, Y.~A. and Lunney, D. and Manea, V. and Neidherr, D. and Rosenbusch, M. and Schweikhard, L. and Welker, A. and Wienholtz, F. and Wolf, R.~N. and Zuber, K.

Keywords

Binding energies and masses, Mass spectrometers, r-process

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.

Precision Mass Measurements of $^Cd$-131$_129$ and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process

Keywords

Abstract

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