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First observation of superdeformed states in 191Bi

  • M. Nyman
  • S. Juutinen
  • D. M. Cullen
  • I. Darby
  • S. Eeckhaudt
  • T. Grahn
  • P. T. Greenlees
  • A. Herzan
  • U. Jakobsson
  • P. Jones
  • R. Julin
  • H. Kettunen
  • M. Leino
  • A.-P. Leppänen
  • P. Nieminen
  • J. Pakarinen
  • P. Rahkila
  • M. Sandzelius
  • J. Sarén
  • C. Scholey
  • J. Uusitalo
Regular Article - Experimental Physics

Abstract.

Prompt \( \gamma\) -rays from 191Bi have been studied by means of the recoil-decay-tagging technique. Two superdeformed rotational bands have been observed and interpreted as signature partners originating from the \( 1/2[651]\) Nilsson orbital. This is the lightest Bi isotope where superdeformation has been observed. The two previously observed oblate strongly coupled bands feeding the isomeric \( 13/2^{+}\) state and the \( 9/2^{-}\) ground state were extended to higher spins. The bands built on the \( 1/2^{+}\) intruder state were investigated in detail, showing signs of a more deformed prolate or triaxial shape in 191Bi compared to 193Bi .

Keywords

Prolate Level Scheme Yrast Band Intruder State Superdeformed 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

© SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • M. Nyman
    • 1
  • S. Juutinen
    • 1
  • D. M. Cullen
    • 2
  • I. Darby
    • 1
  • S. Eeckhaudt
    • 1
  • T. Grahn
    • 1
  • P. T. Greenlees
    • 1
  • A. Herzan
    • 1
  • U. Jakobsson
    • 1
  • P. Jones
    • 1
  • R. Julin
    • 1
  • H. Kettunen
    • 1
  • M. Leino
    • 1
  • A.-P. Leppänen
    • 1
  • P. Nieminen
    • 1
  • J. Pakarinen
    • 1
  • P. Rahkila
    • 1
  • M. Sandzelius
    • 1
  • J. Sarén
    • 1
  • C. Scholey
    • 1
  • J. Uusitalo
    • 1
  1. 1.Department of PhysicsUniversity of JyväskyläJyväskyläFinland
  2. 2.School of Physics and Astronomy, Schuster LaboratoryThe University of ManchesterManchesterUK

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