Single-particle Behavior at N=126: Isomeric Decays in Neutron-rich 204Pt

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Abstract

The four proton-hole nucleus Pt-204 was populated in the fragmentation of an E/A = 1 GeV Pb-208 beam. The yrast structure of Pt-204 has been observed up to angular momentum I = 10h by detecting delayed gamma-ray transitions originating from metastable states. These long-lived excited states have been identified to have spin-parities of I-pi = (10(+)), (7(-)), and (5(-)) and half-lives of T-1/2 = 146(14) ns, 55(3) mu s, and 5.5(7) mu s, respectively. The structure of the magic N = 126 Pt-204 nucleus is discussed and understood in terms of the spherical shell model. The data suggest a revision of the two-body interaction for N = 126, Z < 82, which determines the evolution of nuclear structure toward the r-process waiting point nuclei.

Details

Authors
  • S. J. Steer
  • Zs. Podolyak
  • S. Pietri
  • M. Gorska
  • P. H. Regan
  • E. Werner-Malento
  • A. B. Garnsworthy
  • Robert Hoischen
  • J. Gerl
  • H. J. Wollersheim
  • K. H. Maier
  • H. Grawe
  • F. Becker
  • P. Bednarczyk
  • L. Caceres
  • P. Doornenbal
  • H. Geissel
  • J. Greabosz
  • A. Kelic
  • I. Kojouharov
  • N. Kurz
  • F. Montes
  • W. Prokopowicz
  • T. Saito
  • H. Schaffner
  • S. Tashenov
  • A. Heinz
  • M. Pfuetzner
  • T. Kurtukian-Nieto
  • G. Benzoni
  • 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
  • O. Wieland
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number061302(R)
JournalPhysical Review C (Nuclear Physics)
Volume78
Issue number6
Publication statusPublished - 2008
Publication categoryResearch
Peer-reviewedYes