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Zeitschrift für Physik A Hadrons and Nuclei

, Volume 356, Issue 4, pp 393–397 | Cite as

Fragmentation of the yrast band in186Os atI π =18+ and disappearance of the collective minimum

  • D. L. Balabanski
  • D. Hr. Hristov
  • R. M. Lieder
  • T. Rzaca-Urban
  • W. Gast
  • G. Hebbinghaus
  • A. Krämer-Flecken
  • H. Schnare
  • W. Urban
  • R. Wyss
Article

Abstract

High-spin states in186Os have been populated by the186W(4He,4n)-reaction at 55MeV. The emittedγ-radiation was detected with the OSIRIS spectrometer. The yrast band, for which the nucleus has a prolate shape, was found to terminate atI π =18+. Theγ-ray intensity is then distributed between several irregular sequences. Different to other cases of band termination, the minimum in the total routhian surface corresponding to a collective shape is calculated to disappear in this spin region, although the available spin of the valence nucleons is far from being exhausted. A different structure, which is dominated by non-collective states becomes yrast.

PACS

23.20.En 23.20.Lv 27.70.+q 21.60.Ev 

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Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • D. L. Balabanski
    • 1
  • D. Hr. Hristov
    • 1
  • R. M. Lieder
    • 2
  • T. Rzaca-Urban
    • 2
  • W. Gast
    • 2
  • G. Hebbinghaus
    • 2
  • A. Krämer-Flecken
    • 2
  • H. Schnare
    • 2
  • W. Urban
    • 2
  • R. Wyss
    • 3
  1. 1.Faculty of PhysicsSt. Kliment Ohridsky University of SofiaSofiaBulgaria
  2. 2.Institut für KernphysikForschungszentrum JülichJülichGermany
  3. 3.Royal Institute of TechnologyStockholmSweden

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