Identification of deformed intruder states in semi-magic Ni-70
- Chiara C., J.
- Weisshaar, D.
- Janssens R. V., F.
- Tsunoda, Y.
- Otsuka, T.
- Harker J., L.
- Walters W., B.
- Recchia, F.
- Albers, M.
- Alcorta, M.
- Bader V., M.
- Baugher, T.
- Bazin, Dominique
- Berryman J., S.
- Bertone P., F.
- Campbell C., M.
- Carpenter M., P.
- Chen, Jie
- Crawford H., L.
- David H. M. Doherty D., T.
- Gade, A.
- Hoffman C., R.
- Honma, M.
- Kondev F., G.
- Korichi, A.
- Langer, C.
- Larson, N.
- Lauritsen, T.
- Liddick S., N.
- Lunderberg, E.
- Macchiavelli A., O.
- Noji, S.
- Prokop, C.
- Rogers A., M.
- Seweryniak, D.
- Shimizu, N.
- Stroberg S., R.
- Suchyta, S.
- Utsuno, Y.
- Williams S., J.
- Wimmer, K.
- Zhu, S.
DOIAbstract
International audienceThe structure of semi-magic Ni-70(28)42 was investigated following complementary multinucleon-transfer and secondary fragmentation reactions. Changes to the higher-spin, presumed negative-parity states based on observed gamma-ray coincidence relationships result in better agreement with shell-model calculations using effective interactions in the neutron f(5/2)pg(9/2) model space. The second 2(+) and (4(+)) states, however, can only be successfully described when proton excitations across the Z = 28 shell gap are included. Monte Carlo shell-model calculations suggest that the latter two states are part of a prolate-deformed intruder sequence, establishing an instance of shape coexistence at low excitation energies simi...
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