Isospin and deformation studies in the odd-odd N = Z nucleus Co-54

D. Rudolph, L. -L. Andersson, R. Bengtsson, J. Ekman, O. Erten, C. Fahlander, E. K. Johansson, I. Ragnarsson, C. Andreoiu, M. A. Bentley, M. P. Carpenter, R. J. Charity, R. M. Clark, P. Fallon, A. O. Macchiavelli, W. Reviol, D. G. Sarantites, D. Seweryniak, C. E. Svensson, S. J. Williams

Research output: Contribution to journalArticlepeer-review

Abstract

High-spin states in the odd-odd N = Z nucleus Co-54 have been investigated by the fusion-evaporation reaction Si-28(S-32,1 alpha 1p1n)Co-54. Gamma-ray information gathered with the Ge detector array Gammasphere was correlated with evaporated particles detected in the charged particle detector system Microball and a 1 pi neutron detector array. A significantly extended excitation scheme of Co-54 is presented, which includes a candidate for the isospin T = 1, 6(+) state of the 1f(7/2)(-2) multiplet. The results are compared to large-scale shell-model calculations in the fp shell. Effective interactions with and without isospin-breaking terms have been used to probe isospin symmetry and isospin mixing. A quest for deformed high-spin rotational cascades proved negative. This feature is discussed by means of cranking calculations.

Original languageEnglish
Article number054309
Pages (from-to)-
Number of pages14
JournalPhysical Review C
Volume82
Issue number5
DOIs
Publication statusPublished - 15 Nov 2010

Keywords

  • SHELL-MODEL DESCRIPTION
  • HIGH-SPIN STATES
  • ROTATIONAL BANDS
  • CHANNEL-SELECTION
  • NI-56
  • DECAY
  • SPECTROSCOPY
  • GAMMASPHERE

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