Gamma-ray spectroscopy of the doubly magic nucleus 56Ni

  • E. K. Johansson
  • , D. Rudolph
  • , J. Ekman
  • , C. Fahlander
  • , C. Andreoiu
  • , M. A. Bentley
  • , M. P. Carpenter
  • , R. J. Charity
  • , R. M. Clark
  • , P. Fallon
  • , R. V.F. Janssens
  • , F. G. Kondev
  • , T. L. Khoo
  • , T. Lauritsen
  • , A. O. MacChiavelli
  • , W. Reviol
  • , D. G. Sarantites
  • , D. Seweryniak
  • , C. E. Svensson
  • , S. J. Williams

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The doubly magic N = Z nucleus 56Ni has been investigated with two fusion-evaporation reactions; 40Ca(28Si, 3α)56Ni at a beam energy of 122MeV and 28Si( 32S, 2p2n)56Ni at 130MeV. To detect γ-rays in coincidence with evaporated particles the Ge-detector array Gammasphere was used in conjunction with the charged-particle detector system, Microball and a 1π neutron detector array. Results include a significantly extended level scheme of 56Ni, which is compared to large-scale shell model calculations in the fp shell. The experimental and theoretical results agree to a large extent, with one notable exception; the theoretical model fails to predict the proper sequence of the yrast and yrare 8+ states.

Original languageEnglish
Pages (from-to)157-165
Number of pages9
JournalEuropean Physical Journal A
Volume27
Issue number2
DOIs
StatePublished - Feb 2006

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