Identification of deformed intruder states in semi-magic Ni-70

Abstract : The 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 similar to that observed recently in neighboring Ni-68.
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Physical Review C, American Physical Society, 2015, 91 (issue 4), pp.044309. 〈10.1103/PhysRevC.91.044309〉
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http://hal.in2p3.fr/in2p3-01148014
Contributeur : Emilie Bonnardel <>
Soumis le : lundi 4 mai 2015 - 09:37:51
Dernière modification le : jeudi 11 janvier 2018 - 06:26:24

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J. Chiara C., D. Weisshaar, F. Janssens R. V., Y. Tsunoda, T. Otsuka, et al.. Identification of deformed intruder states in semi-magic Ni-70. Physical Review C, American Physical Society, 2015, 91 (issue 4), pp.044309. 〈10.1103/PhysRevC.91.044309〉. 〈in2p3-01148014〉

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