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Lifetimes of triaxial superdeformed states in 163Lu and 164Lu

  • G. Schönwaßer
  • H. Hübel
  • G.B. Hagemann
  • J. Domscheit
  • A. Görgen
  • B. Herskind
  • G. Sletten
  • J.N. Wilson
  • D.R. Napoli
  • C. Rossi-Alvarez
  • D. Bazzacco
  • R. Bengtsson
  • H. Ryde
  • P.O. Tjøm
  • S.W. Ødegård

Abstract:

Lifetimes of states in the yrast superdeformed bands of 163Lu and 164Lu were determined in a Doppler-shift attenuation-method experiment. From fractional Doppler shifts and line shapes, average transition quadrupole moments, Qt = 8.2-0.6+1.0 b and 7.1-0.6+0.5 b, were deduced for one of the bands in 163Lu and 164Lu, respectively. These values are much larger than the quadrupole moment of the normal-deformed yrast band in 163Yb, Qt = 4.9-0.4+1.3 b, that was also determined in this experiment. Comparison to cranking calculations indicates that both superdeformed bands correspond to a local potential energy minimum with a pronounced triaxiality, γ∼ 20°.

PACS. 21.10.-k Properties of nuclei; nuclear energy levels – 21.10.Tg Lifetimes – 25.70.-z Low and intermediate energy heavy-ion reactions – 27.70.+q 150 ?A? 189 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2002

Authors and Affiliations

  • G. Schönwaßer
    • 1
  • H. Hübel
    • 1
  • G.B. Hagemann
    • 2
  • J. Domscheit
    • 1
  • A. Görgen
    • 1
  • B. Herskind
    • 2
  • G. Sletten
    • 2
  • J.N. Wilson
    • 2
  • D.R. Napoli
    • 3
  • C. Rossi-Alvarez
    • 4
  • D. Bazzacco
    • 4
  • R. Bengtsson
    • 5
  • H. Ryde
    • 6
  • P.O. Tjøm
    • 7
  • S.W. Ødegård
    • 7
  1. 1.Institut für Strahlen und Kernphysik, Nussallee 14-16, Universität Bonn, D-53115 Bonn, GermanyDE
  2. 2.The Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen Ø, DenmarkDK
  3. 3.Laboratori Nazionali di Legnaro, INFN, I-35020 Legnaro, ItalyIT
  4. 4.Dipartimento di Fisica and INFN, I-35131 Padua, ItalyIT
  5. 5.Department of Mathematical Physics, Lund Institute of Technology, S-22362 Lund, SwedenSE
  6. 6.Department of Physics, University of Lund, S-22362 Lund, SwedenSE
  7. 7.Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, NorwayNO

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