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Plumbing Neutron Stars to New Depths with the Binding Energy of the Exotic Nuclide 82Zn

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30312

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

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30319

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

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30324

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

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30722

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

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30844

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

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Citation

Wolf, R., Beck, D., Blaum, K., Böhm, C., Borgmann, C., Breitenfeldt, C., et al. (2013). Plumbing Neutron Stars to New Depths with the Binding Energy of the Exotic Nuclide 82Zn. Physical Review Letters, 110(04): 041101, pp. 1-5. doi:10.1103/PhysRevLett.110.041101.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-B558-8
Abstract
Modeling the composition of neutron-star crusts depends strongly on binding energies of neutron-rich nuclides near the N=50 and N=82 shell closures. Using a recent development of time-of-flight mass spectrometry for on-line purification of radioactive ion beams to access more exotic species, we have determined for the first time the mass of 82Zn with the ISOLTRAP setup at the ISOLDE-CERN facility. With a robust neutron-star model based on nuclear energy-density-functional theory, we solve the general relativistic Tolman-Oppenheimer-Volkoff equations and calculate the neutron-star crust composition based on the new experimental mass. The composition profile is not only altered but now constrained by experimental data deeper into the crust than before.