Single-neutron orbits near isotope 79Zn

Phys. Lett. B

740
298
(2015)
R. Orlandi , D. Mücher , R. Raabe , A. Jungclaus , S.D. Pain , V. Bildstein , R. Chapman, G. de Angelis , J.G. Johansen, P. Van Duppen, A.N. Andreyev, S. Bottoni, T.E. Cocolios, H. De Witte, J. Diriken, J. Elseviers, F. Flavigny, L.P. Gaffney, R. Gernhäuser, A. Gottardo, M. Huyse, A. Illana, J. Konki, T. Kröll, R. Krücken, J.F.W. Lane, V. Liberati, B. Marsh, K. Nowak, F. Nowacki, J. Pakarinen, E. Rapisarda, F. Recchia, P. Reiter, T. Roger, E. Sahin, M. Seidlitz, K. Sieja, J.F. Smith, J.J. Valiente Dobón, M. von Schmid, D. Voulot, N. Warr, F.K. Wenander, K. Wimmer

Single-neutron states in the Z = 30, N = 49 isotope 79Zn have been populated using the 78Zn(d, p)79Zn
transfer reaction at REX-ISOLDE, CERN. The experimental setup allowed the combined detection of
protons ejected in the reaction, and of γ rays emitted by 79Zn. The analysis reveals that the lowest
excited states populated in the reaction lie at approximately 1 MeV of excitation, and involve neutron
orbits above the N = 50 shell gap. From the analysis of γ -ray data and of proton angular distributions,
characteristic of the amount of angular momentum transferred, a 5/2+ configuration was assigned to a
state at 983 keV. Comparison with large-scale-shell-model calculations supports a robust neutron N = 50
shell-closure for 78Ni. These data constitute an important step towards the understanding of the magicity
of 78Ni and of the structure of nuclei in the region.

DOI
10.1016/j.physletb.2014.12.006
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