Isospin and deformation studies in the odd-odd N=Z nucleus Co54

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

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Abstract

High-spin states in the odd-odd N=Z nucleus Co54 have been investigated by the fusion-evaporation reaction Si28(S32,1α1p1n)Co54. 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 1π neutron detector array. A significantly extended excitation scheme of Co54 is presented, which includes a candidate for the isospin T=1, 6⊃+ state of the 1f7/2-2 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 (US)
Article number054309
JournalPhysical Review C - Nuclear Physics
Volume82
Issue number5
DOIs
StatePublished - Nov 15 2010
Externally publishedYes

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Rudolph, D., Andersson, L. L., Bengtsson, R., Ekman, J., Erten, O., Fahlander, C., Johansson, E. K., Ragnarsson, I., Andreoiu, C., Bentley, M. A., Carpenter, M. P., Charity, R. J., Clark, R. M., Fallon, P., MacChiavelli, A. O., Reviol, W., Sarantites, D. G., Seweryniak, D., Svensson, C. E., & Williams, S. J. (2010). Isospin and deformation studies in the odd-odd N=Z nucleus Co54. Physical Review C - Nuclear Physics, 82(5), [054309]. https://doi.org/10.1103/PhysRevC.82.054309