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58Ni: an unpaired band crossing at new heights of angular momentum for rotating nuclei |
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| Authors: | Rudolph D Carlsson B G Ragnarsson I Aberg S Andreoiu C Bentley M A Carpenter M P Charity R J Clark R M Cromaz M Ekman J Fahlander C Fallon P Ideguchi E Macchiavelli A O Mineva M N Reviol W Sarantites D G Seweryniak D Williams S J |
| Institution: | Department of Physics, Lund University, S-22100 Lund, Sweden. |
| Abstract: | High-spin states in 58Ni have been investigated by means of the fusion-evaporation reaction 28Si(32S, 2p)58Ni at 130 MeV beam energy. Discrete-energy levels are observed in 58Ni at record-breaking 42 MeV excitation energy and angular momenta in excess of 30h. The states form regular rotational bands with unprecedented high rotational frequencies. A comparison with configuration dependent cranked Nilsson-Strutinsky calculations reveals an exceptional two-band crossing scenario, the interaction strength of which is strongly shape dependent. |
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