December 2016

Journal

Single-neutron orbits near 78Ni: Spectroscopy of the N=49 isotope 79Zn

By:
Orlandi, R.; Mücher, D.; Raabe, R.; Jungclaus, A.; Pain, Steven D; Bildstein, V.; Chapman, R.; De Angelis, G.; Johansen, J.; Van Duppen, P.; Andreyev, A.; Bottoni, S.; Cocolios, T.; De Witte, H.; Diriken, J.; Elseviers, E.; Flavigny, F.; Gaffney, L.; Gernhäuser, R.; Gottardo, A.; Huyse, M.; Illana, A.; Konki, J.; Kröll, T.; Krücken, R.; Lane, J.; Liberati, V.; Marsh, B.; Nowak, K.; Nowacki, F.; Pakarinen, J.; Rapisarda, E.; Recchia, F.; Reiter, P.; Roger, T.; Sahin, E.; Seidlitz, M.; Sieja, K.; Smith, J.; Valiente Dobón, J.; von Schmid, M.; Voulot, D.; Warr, N.; Wenander, F.; Wimmer, K.
Journal Name:
Physics Letters B
Page Number:
298-302
Volume:
740
Issue Number:
N/A
Publication Date:
December 29, 2016
View DOI Listing:
https://doi.org/10.1016/j.physletb.2014.12.006

Abstract

Single-neutron states in the Z = 30, N = 49 isotope Zn-79 have been populated using the Zn-78(d,p)Zn-79 transfer reaction at REX-ISOLDE, CERN. The experimental setup allowed the combined detection of protons ejected in the reaction, and of y rays emitted by Zn-79. 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 gamma-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 Ni-78. These data constitute an important step towards the understanding of the magicity of 78Ni and of the structure of nuclei in the region. (C) 2014 The Authors. Published by Elsevier B.V.

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