Single-neutron orbits near Ni; Spectroscopy of the N=49 isotope Zn

Ni近くの中性子軌道; N=49同位体Znの分光

Orlandi, R.  ; Mcher, D.*; Raabe, R.*; Jungclaus, A.*; Pain, S. D.*; Bildstein, V.*; Chapman, R.*; De Angelis, G.*; Johansen, J. G.*; Van Duppen, P.*; Andreyev, A. N.*; Bottoni, S.*; Cocolios, T. E.*; De Witte, H.*; Diriken, J.*; Elseviers, J.*; Flavigny, F.*; Gaffney, L. P.*; Gernhuser, R.*; Gottardo, A.*; Huyse, M.*; Illana, A.*; Konki, J.*; Krll, T.*; Krcken, R.*; Lane, J. F. W.*; 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. F.*; Valiente-Dobn, J. J.*; von Schmid, M.*; Voulot, D.*; Warr, N.*; Wenander, F. K.*; Wimmer, K.*

Orlandi, R.; Mcher, D.*; Raabe, R.*; Jungclaus, A.*; Pain, S. D.*; Bildstein, V.*; Chapman, R.*; De Angelis, G.*; Johansen, J. G.*; Van Duppen, P.*; Andreyev, A. N.*; Bottoni, S.*; Cocolios, T. E.*; De Witte, H.*; Diriken, J.*; Elseviers, J.*; Flavigny, F.*; Gaffney, L. P.*; Gernhuser, R.*; Gottardo, A.*; Huyse, M.*; Illana, A.*; Konki, J.*; Krll, T.*; Krcken, R.*; Lane, J. F. W.*; 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. F.*; Valiente-Dobn, J. J.*; von Schmid, M.*; Voulot, D.*; Warr, N.*; Wenander, F. K.*; Wimmer, K.*

Single-neutron states in Zn have been populated using the reaction Zn(d,p) at REX-Isolde, CERN. The analysis reveals that the lowest excited states in Zn lie at approximately 1 MeV, and involve neutron orbits above the N=50 shell gap. A 5/2 configuration was assigned to the 983-keV state. Comparison with large-scale shell model calculations supports a robust neutron N=50 shell closure for Ni. These data constitute an important step towards the understanding the magicity of Ni and the structure of nuclei in the region.