58Ni: an unpaired band crossing at new heights of angular momentum for rotating nuclei.

Authors :: Rudolph D
Carlsson BG
Ragnarsson I
Aberg S
Andreoiu C
Bentley MA
Carpenter MP
Charity RJ
Clark RM
Cromaz M
Ekman J
Fahlander C
Fallon P
Ideguchi E
Macchiavelli AO
Mineva MN
Reviol W
Sarantites DG
Seweryniak D
Williams SJ
Source :: Physical review letters [Phys Rev Lett] 2006 Mar 10; Vol. 96 (9), pp. 092501. Date of Electronic Publication: 2006 Mar 08.
Publication Year :: 2006
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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