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High-accuracy mass measurements of neutron-rich Kr isotopes

P. Delahaye1, G. Audi2, K. Blaum3,4, F. Carrel4,*, S. George3,4, F. Herfurth4, A. Herlert5,†, A. Kellerbauer1,‡, H.-J. Kluge4,6 et al.

D. Lunney2, L. Schweikhard5, and C. Yazidjian4

  • 1ISOLDE, CERN, Physics Department, CH-1211 Geneva 23, Switzerland
  • 2CSNSM-CNRS-IN2P3, F-91405 Orsay, France
  • 3Johannes Gutenberg-Universität, Institut für Physik, D-55099 Mainz, Germany
  • 4Gesellschaft für Schwerionenforschung GSI, D-64291 Darmstadt, Germany
  • 5Ernst-Moritz-Arndt-Universität, Institut für Physik, D-17487 Greifswald, Germany
  • 6Ruprecht-Karls-Universität Heidelberg, Physikalisches Institut, D-69120 Heidelberg, Germany

  • *Present address: CEA-Saclay, F-91191 Gif-sur-Yvette, France.
  • †Present address: ISOLDE, CERN, Physics Department, CH-1211 Geneva 23, Switzerland.
  • ‡Present address: Max Planck Institute for Nuclear Physics, Postfach 103980, D-69029 Heidelberg, Germany.
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Phys. Rev. C 74, 034331 – Published 28 September, 2006

DOI: https://doi.org/10.1103/PhysRevC.74.034331

Abstract

The atomic masses of the neutron-rich krypton isotopes Kr84,86−95 have been determined with the tandem Penning trap mass spectrometer ISOLTRAP with uncertainties ranging from 20 to 220 ppb. The masses of the short-lived isotopes Kr94 and Kr95 were measured for the first time. The masses of the radioactive nuclides Kr89 and Kr91 disagree by 4 and 6 standard deviations, respectively, from the present Atomic-Mass Evaluation database. The resulting modification of the mass surface with respect to the two-neutron separation energies as well as implications for mass models and stellar nucleosynthesis are discussed.

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Phys. Rev. C 74, 034331– Published 28 September, 2006
  • Received 5 May 2006

© 2006 American Physical Society

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