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Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements

Research output: Contribution to journalArticle

  • M. W. Reed
  • I. J. Cullen
  • P. M. Walker
  • Yu. A. Litvinov
  • K. Blaum
  • F. Bosch
  • C. Brandau
  • J. J. Carroll
  • D. M. Cullen
  • A. Y. Deo
  • B. Detwiller
  • C. Dimopoulou
  • G. D. Dracoulis
  • F. Farinon
  • H. Geissel
  • E. Haettner
  • M. Heil
  • R. S. Kempley
  • R. Knoebel
  • C. Kozhuharov
  • J. Kurcewicz
  • N. Kuzminchuk
  • S. Litvinov
  • R. Mao
  • C. Nociforo
  • F. Nolden
  • W. R. Plass
  • A. Prochazka
  • C. Scheidenberger
  • M. Steck
  • Th. Stoehlker
  • B. Sun
  • T. P. D. Swan
  • G. Trees
  • H. Weick
  • N. Winckler
  • M. Winkler
  • T. Yamaguchi

Related Edinburgh Organisations

Original languageEnglish
Article number172501
Pages (from-to)-
Number of pages5
JournalPhysical Review Letters
Issue number17
Publication statusPublished - 18 Oct 2010


A study of cooled Au-197 projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides Hf-183,Hf-184,Hf-186 and Ta-186,Ta-187. The results support the prediction of a strongly favored isomer region near neutron number 116.

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