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Prolate deformation in the 187,189Bi isotopes

  • A. Hürstel
  • Y. Le Coz
  • E. Bouchez
  • A. Chatillon
  • A. Görgen
  • P. T. Greenlees
  • K. Hauschild
  • S. Juutinen
  • H. Kettunen
  • W. Korten
  • P. Nieminen
  • M. Rejmund
  • Ch Theisen
  • J. Wilson
  • A. N. Andreyev
  • F. Becker
  • T. Enqvist
  • P. M. Jones
  • R. Julin
  • H. Kankaanpää
  • A. Keenan
  • P. Kuusiniemi
  • M. Leino
  • A.-P. Leppänen
  • M. Muikku
  • J. Pakarinen
  • P. Rahkila
  • J. Uusitalo
Letter

Abstract.

Prompt and delayed gamma-ray spectroscopy of very neutron-deficient bismuth isotopes 187, 189Bi has been performed using the recoil decay tagging method. A rotational band has been observed in 189Bi and is interpreted as a complete decoupling of a single proton from the deformed lead core. The results for 187Bi suggest a similar structure and coupling scheme. This study gives the first evidence for a prolate band in a light bismuth nucleus and confirms the prolate character of the low-lying rotational band observed in the core nuclei 188Pb and 186Pb.

Keywords

Spectroscopy Bismuth Prolate Coupling Scheme Rotational Band 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • A. Hürstel
    • 1
  • Y. Le Coz
    • 1
  • E. Bouchez
    • 1
  • A. Chatillon
    • 1
  • A. Görgen
    • 1
  • P. T. Greenlees
    • 2
  • K. Hauschild
    • 1
  • S. Juutinen
    • 2
  • H. Kettunen
    • 2
  • W. Korten
    • 1
  • P. Nieminen
    • 2
  • M. Rejmund
    • 1
  • Ch Theisen
    • 1
  • J. Wilson
    • 1
  • A. N. Andreyev
    • 3
  • F. Becker
    • 1
  • T. Enqvist
    • 2
  • P. M. Jones
    • 2
  • R. Julin
    • 2
  • H. Kankaanpää
    • 2
  • A. Keenan
    • 2
  • P. Kuusiniemi
    • 2
  • M. Leino
    • 2
  • A.-P. Leppänen
    • 2
  • M. Muikku
    • 2
  • J. Pakarinen
    • 2
  • P. Rahkila
    • 2
  • J. Uusitalo
    • 2
  1. 1.DAPNIA/SPhN CEA-SaclayGif-sur-Yvette CedexFrance
  2. 2.JYFLUniversity of JyväskyläJyväskyläFinland
  3. 3.Department of PhysicsUniversity of LiverpoolLiverpoolUK

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