Change in structure between the I=1/2 states in 181Tl and 177,179Au

Research output: Contribution to journalArticle


  • Cubiss James G.
  • A. E. Barzakh
  • Maxim Seliverstov
  • Andrei N. Andreyev
  • B. Andel
  • Stanislav Antalic
  • Philippe Ascher
  • Dimitar Atanasov
  • D. Beck
  • Jacek Bieron
  • Klaus Blaum
  • Christopher Borgmann
  • Martin Breitenfeldt
  • L. Capponi
  • Thomas Elias Cocolios
  • Thomas Day Goodacre
  • Xavier Derkx
  • Hilde De Witte
  • Jytte Elseviers
  • D.V. Fedorov
  • Valentin N. Fedosseev
  • Stephan Fritzsche
  • Liam Paul Gaffney
  • Fritz Peter Hessberger
  • Mark Huyse
  • Nobuaki Imai
  • Z. Kalaninova
  • D. Kisler
  • Ulli Koester
  • Magdalena Kowalska
  • S. Kreim
  • Joseph F.W. Lane
  • Valentina Liberati
  • David Lunney
  • Kara M Lynch
  • Vladimir Manea
  • Bruce A Marsh
  • S. Mitsuoka
  • P.L. Molkanov
  • Y. Nagame
  • Dennis Neidherr
  • K. Nishio
  • S. Ota
  • Deyan Radulov
  • Elisa Rapisarda
  • J. P. Revill
  • M. Rosenbusch
  • Ralf Erik Rossel
  • Sebastian Rothe
  • Karanjeet Sandhu
  • Lutz Schweikhard
  • Simon Sels
  • V.L. Truesdale
  • Celine Van Beveren
  • Paul Van den Bergh
  • Y. Wakabayashi
  • Piet Van Duppen
  • K.D.A. Wendt
  • Frank Wienholtz
  • B. W. Whitmore
  • G.L. Wilson
  • R.N. Wolf
  • Kai Zuber

Institutes & Expert groups

  • GSI - Helmholtzzentrum für Schwerionenforschung GmbH - Germany

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The first accurate measurements of the alpha-decay branching ratio and half-life of the Ipi = 1/2+ ground state in 181Tl have been made, along with the first determination of the magnetic moments and I=1/2 spin assignments of the ground states in 177,179Au. The results are discussed within the complementary systematics of the reduced alpha-decay widths and nuclear g factors of low-lying, Ipi = 1/2+ states in the neutron-deficient lead region. The finding shed light on the unexpected hindrance of the 1/2+->1/2+, 181Tl(g) -> 177Au(g) alpha decay, which is explained by a mixing of pi3s1/2 and pi2d3/2 configurations in 177Au(g), whilst 181Tl(g) remains a near-pure pi3s1/2. This conclusion is inferred from the g factor of 177Au(g) which has an intermediate value between those of pi3s1/2 and pi2d3/2 states. A similar mixed configuration is proposed for the Ipi=1/2+ ground state of 179Au. This mixing may provide evidence for triaxial shapes in the ground states in the these nuclei.


Original languageEnglish
Pages (from-to)355-363
JournalPhysical Review C
StatePublished - 5 Oct 2018


  • laser spectroscopy, ISOLDE, alpha decay

ID: 4520784