Discovery of a new isomeric state in Ni-68: Evidence for a highly deformed proton intruder state

Dijon A., Clément E., de France G., de Angelis G., Duchene G., Dudouet J., ...Daha Fazla

PHYSICAL REVIEW C, cilt.85, 2012 (SCI İndekslerine Giren Dergi) identifier identifier


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.