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Discovery of a new isomeric state in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>68</mml:mn></mml:msup></mml:math>Ni: Evidence for a highly deformed proton intruder state
We report on the observation of a new isomeric state in 68Ni. We suggest that the newly observed state at 168(1) keV above the first 2+ state is a π(2p−2h) 0+ state across the major Z=28 shell gap. Comparison with theoretical calculations indicates a pure proton intruder configuration and the …