Gamma-ray spectroscopy of the doubly magic nucleus
- 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
Publication date
March 2006
DOI Publisher
Springer Science and Business Media LLCAbstract
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
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