Evidence for an Isomeric 3/2- State in 53Co

Research output: Contribution to journalArticle


The fragmentation of a 550MeV/u primary beam of Ni-58 on a Be-9 target has been used to measure time-and energy-correlated gamma decays following the implantation of event-by-event discriminated secondary fragments into a Be-9 stopper plate. A new isomeric gamma decay with T-1/2 = 14(6 4) ns and E-gamma = 646.2(2) keV is observed and attributed to the decay of the yrast 3/2-state in Co-53(27)26. This short-lived isomeric state has been populated by means of nuclear reactions during the stopping process of the secondary fragments. The experimental findings are discussed in the framework of large-scale spherical shell model calculations in conjunction with isospin symmetry-breaking residual interactions for the A = 53, Tz = +/- 1/2 mirror nuclei Co-53 and Fe-53.


  • Robert Hoischen
  • S Pietri
  • Zs Podolyak
  • P H Regan
  • A B Garnsworthy
  • S J Steer
  • F Becker
  • P Bednarczyk
  • L Caceres
  • P Doornenbal
  • J Gerl
  • M Gorska
  • J Grebosz
  • I Kojouharov
  • N Kurz
  • W Prokopowicz
  • H Schaffner
  • H J Wollersheim
  • Lise-Lotte Andersson
  • L Atanasova
  • D L Balabanski
  • M A Bentley
  • A Blazhev
  • C Brandau
  • J R Brown
  • Emma Johansson
  • A Jungclaus
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Pages (from-to)131-138
JournalEuropean Physical Journal A. Hadrons and Nuclei
Issue number2
Publication statusPublished - 2008
Publication categoryResearch

Related research output

Hoischen, R., 2011, Department of Physics, Lund University. 138 p.

Research output: ThesisDoctoral Thesis (compilation)

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Related projects

Robert Hoischen, Dirk Rudolph, Pavel Golubev & J Gerl


Project: Dissertation

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