Isospin and Deformation Studies in the Odd-odd N = Z Nucleus 54Co

Summary, in English

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.

• Author: Dirk Rudolph; Lise-Lotte Andersson; Ragnar Bengtsson; Jörgen Ekman; O. Erten; Claes Fahlander; Emma Johansson; Ingemar Ragnarsson; Corina 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
• Department/s: Nuclear physics; Mathematical Physics
• Publishing year: 2010
• Language: English
• Publication/Series: Physical Review C (Nuclear Physics)
• Volume: 82
• Issue: 5
• Links: http://dx.doi.org/10.1103/PhysRevC.82.054309
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics; Physical Sciences
• Status: Published
• Research group: Nuclear Structure
• ISBN/ISSN/Other: ISSN: 0556-2813