Search for proton emission of the isomeric 10+ state in 54Ni

Research output: Contribution to journalArticle


Several experiments were conducted at the 10 MV Van-de-Graaff tandem accelerator at the Institute of Nuclear Physics, Cologne, to detect proton emission from the isomeric 6457-keV 10+ state in 54Ni. Excitation functions for two fusion–evaporation reactions were measured to maximise the population of the rare two-neutron evaporation channel from a 56Ni compound nucleus. The search for delayed proton emission was based on the 28Si(28Si,2n)54Ni reaction at a beam energy of 70 MeV. For this reaction, a cross-section limit for the population of the 10+ state in 54Ni and its proton-decay branch was determined to be σ< 22 nb.


  • K. Stahl
  • A. Wendt
  • P. Reiter
  • A. Blazhev
  • B. Bruyneel
  • J. Eberth
  • C. Fransen
  • H. Hess
  • R. Hoischen
  • A. Holler
  • M. Kalkühler
  • T. Kotthaus
  • D. Lersch
  • G. Pascovici
  • M. Seidlitz
  • B. Siebeck
  • J. Taprogge
  • N. Warr
  • A. Wiens
  • O. Zell
External organisations
  • University of Cologne
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics


  • nuclear structure, proton emission
Original languageEnglish
Article number22
Number of pages9
JournalEuropean Physical Journal A
Issue number1
Publication statusPublished - 2020 Jan 24
Publication categoryResearch

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