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Plumbing Neutron Stars to New Depths with the Binding Energy of the Exotic Nuclide Zn82

R. N. Wolf D. Beck K. Blaum Ch. Böhm Ch. Borgmann M. Breitenfeldt N. Chamel S. Goriely F. Herfurth M. Kowalska S. Kreim D. Lunney 1 V. Manea E. Minaya Ramirez S. Naimi 1 D. Neidherr M. Rosenbusch L. Schweikhard J. Stanja F. Wienholtz K. Zuber
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609
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 Zn82 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.
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Submitted on : Monday, March 11, 2013 - 5:00:58 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:26 PM

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R. N. Wolf, D. Beck, K. Blaum, Ch. Böhm, Ch. Borgmann, et al.. Plumbing Neutron Stars to New Depths with the Binding Energy of the Exotic Nuclide Zn82. Physical Review Letters, American Physical Society, 2013, 110, pp.041101. ⟨10.1103/PhysRevLett.110.041101⟩. ⟨in2p3-00799169⟩



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