One- and two-phonon wobbling excitations in triaxial Lu-165

Research output: Contribution to journalArticle

Abstract

High-spin states in Lu-165 have been investigated by in-beam gamma-ray coincidence spectroscopy using the EUROBALL spectrometer array. Two new excited rotational bands have been discovered with features similar to a previously known triaxial superdeformed band in that nucleus. Comparison of the decay pattern of these bands, in particular the unusually large E2 transition strength from the first excited to the yrast superdeformed band, to theoretical calculations shows that they belong to a family of wobbling excitations with phonon numbers n(w) = 0, 1 and 2. These results, together with evidence for nuclear wobbling in the neighbouring isotopes Lu-163 and Lu-167, firmly establish this mode of excitation in the A = 165 mass region. The observation of wobbling is a unique signature of stable nuclear triaxiality. (C) 2002 Elsevier Science B.V. All rights reserved.

Details

Authors
  • G Schonwasser
  • H Hubel
  • GB Hagemann
  • P Bednarczyk
  • G Benzoni
  • A Bracco
  • P Bringel
  • R Chapman
  • D Curien
  • J Domscheit
  • B Herskind
  • DR Jensen
  • S Leoni
  • G Lo Bianco
  • WC Ma
  • A Maj
  • A Neusser
  • SW Odegard
  • CM Petrache
  • D Rossach
  • KH Spohr
  • AK Singh
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics

Keywords

  • nuclear energy levels, wobbling excitation, triaxial superdeformation
Original languageEnglish
Pages (from-to)9-16
JournalPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume552
Issue number1-2
StatePublished - 2003
Publication categoryResearch
Peer-reviewedYes