Discovery of a new isomeric state in Ni-68: Evidence for a highly deformed proton intruder state
- Hueyuek, T.
- de France, G.
- de Angelis, G.
- Duchene, G.
- Dudouet, J.
- Franchoo, S.
- Gadea, A.
- Gottardo, A.
- Jacquot, B.
- Kusoglu, Aslı
- Zheng, Y.
- Vancraeyenest, A.
- Valiente-Dobon, J. J.
- Lebhertz, D.
- Lehaut, G.
- Martini, M.
- Napoli, D. R.
- Nowacki, F.
- Peru, S.
- Poves, A.
- Recchia, F.
- Redon, N.
- Sahin, E.
- Schmitt, C.
- Sferrazza, M.
- Sieja, K.
- Stezowski, O.
- Dijon, A.
- Clément, E.
Publication date
January 2012
DOI Publisher
American Physical Society (APS) Journal
Physical Review CAbstract
We report on the observation of a new isomeric state in Ni-68. We suggest that the newly observed state at 168(1) keV above the first 2(+) state is a pi(2p-2h) 0(+) state across the major Z = 28 shell gap. Comparison with theoretical calculations indicates a pure proton intruder configuration and the deduced low-lying structure of this key nucleus suggests a possible shape coexistence scenario involving a highly deformed state
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