title: Plumbing neutron stars to new depths with the binding energy of the exotic nuclide 82Zn.
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 (82)Zn 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.
authors.affiliation: Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany.
authors.forename: R N
authors.initials: RN
authors.lastname: Wolf
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Beck
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Blaum
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: Ch
authors.initials: Ch
authors.lastname: Böhm
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: Ch
authors.initials: Ch
authors.lastname: Borgmann
authors.affiliation: Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200d, B-3001 Heverlee, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Breitenfeldt
authors.affiliation: Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium.
authors.forename: N
authors.initials: N
authors.lastname: Chamel
authors.affiliation: Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Goriely
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Herfurth
authors.affiliation: CERN, 1211 Geneva 23, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Kowalska
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany and CERN, 1211 Geneva 23, Switzerland.
authors.forename: S
authors.initials: S
authors.lastname: Kreim
authors.affiliation: CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France.
authors.forename: D
authors.initials: D
authors.lastname: Lunney
authors.affiliation: CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France.
authors.forename: V
authors.initials: V
authors.lastname: Manea
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany and Helmholtz-Institut Mainz, 55099 Mainz, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Minaya Ramirez
authors.affiliation: CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France and RIKEN Nishina Center for Accelerator-based Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Naimi
authors.affiliation: GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany and Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Neidherr
authors.affiliation: Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Rosenbusch
authors.affiliation: Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Schweikhard
authors.affiliation: Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Stanja
authors.affiliation: Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Wienholtz
authors.affiliation: Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Zuber