Structure of Neutron-rich Nuclei Around the N=126 Closed Shell; the Yrast Structure of 205Au up to Spin-parity I = (19/2+)

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


Heavy neutron-rich nuclei have been populated through the relativistic fragmentation of a Pb-208(82) beam at E/A = 1 GeV on a 2.5 g/cm(2) thick Be target. The synthesised nuclei were selected and identified in-flight using the fragment separator at GSI. Approximately 300 ns after production, the selected nuclei were implanted in an similar to 8 mm thick perspex stopper, positioned at the centre of the RISING gamma-ray detector spectrometer array. A previously unreported isomer with a half-life T-1/2 = 163(5) ns has been observed in the N = 126 closed-shell nucleus Au-205(79). Through gamma-ray singles and gamma-gamma coincidence analysis a level scheme was established. The comparison with a shell model calculation tentatively identifies the spin-parity of the excited states, including the isomer itself, which is found to be I-pi = (19/2(+)).


  • Zs. Podolyak
  • S. J. Steer
  • S. Pietri
  • M. Gorska
  • P. H. Regan
  • A. B. Garnsworthy
  • Robert Hoischen
  • J. Gerl
  • H. J. Wollersheim
  • H. Grawe
  • K. H. Maier
  • F. Becker
  • P. Bednarczyk
  • L. Caceres
  • P. Doornenbal
  • H. Geissel
  • J. Grebosz
  • A. Kelic
  • I. Kojouharov
  • N. Kurz
  • F. Montes
  • W. Prokopowicz
  • T. Saito
  • H. Schaffner
  • S. Tashenov
  • A. Heinz
  • T. Kurtukian-Nieto
  • G. Benzoni
  • M. Pfuetzner
  • A. Jungclaus
  • D. L. Balabanski
  • C. Brandau
  • B. A. Brown
  • A. M. Bruce
  • W. N. Catford
  • I. J. Cullen
  • Zs. Dombradi
  • M. E. Estevez
  • W. Gelletly
  • G. Ilie
  • J. Jolie
  • G. A. Jones
  • M. Kmiecik
  • F. G. Kondev
  • R. Kruecken
  • S. Lalkovski
  • Z. Liu
  • A. Maj
  • S. Myalski
  • S. Schwertel
  • T. Shizuma
  • P. M. Walker
  • E. Werner-Malento
  • O. Wieland
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Title of host publicationEuropean Physical Journal A
Number of pages5
Publication statusPublished - 2009
Publication categoryResearch
Event5th International Conference on Exotic Nuclei and Atomic Masses (ENAM'08) - Ryn, Poland
Duration: 2008 Sep 72008 Sep 13

Publication series

ISSN (Print)1434-6001


Conference5th International Conference on Exotic Nuclei and Atomic Masses (ENAM'08)