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Ground-state properties of neutron-deficient platinum isotopes

  • Th. Hilberath
  • St. Becker
  • G. Bollen
  • H. -J. Kluge
  • U. Krönert
  • G. Passler
  • J. Rikovska
  • R. Wyss
  • the ISOLDE Collaboration
Nuclear Structure and Reactions

Abstract

The hyperfine structure splitting and the isotope shift in the λ=266 nm transition of Pt isotopes within the mass range 183 ≦A≦ 198 have been determined by Resonance Ionization Mass Spectroscopy (RIMS) in combination with Pulsed-Laser Induced Desorption (PLID). The Pt isotopes were obtained at the on-line isotope separator ISOLDE-3/CERN as daugthers of the primarily produced Hg isotopes. Magnetic moments, quadrupole moments, and changes in the mean-square charge radii are deduced and compared with results of a particle-triaxial rotor model and mean field calculations. Good agreement with experimental data (including nuclear level schemes and transition probabilities) can only be obtained if triaxial shape is admitted. The calculations yield a smooth transition in the shape of odd-A Pt nuclei from a slightly deformed, nearly oblate195Pt via triaxial197-187Pt to a strongly deformed nearly prolate177Pt.

PACS

21.10 21.60 27.70 27.80 35.10.F 

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Th. Hilberath
    • 1
  • St. Becker
    • 1
  • G. Bollen
    • 1
  • H. -J. Kluge
    • 1
  • U. Krönert
    • 1
  • G. Passler
    • 1
  • J. Rikovska
    • 2
  • R. Wyss
    • 3
  • the ISOLDE Collaboration
    • 4
  1. 1.Institut für PhysikUniversität MainzMainzFederal Republic of Germany
  2. 2.Clarendon LaboratoryOxfordUK
  3. 3.Joint Institute for Heavy Ion ResearchORNLOak RidgeUSA
  4. 4.CERNGeneva 23Switzerland

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