Nucleon correlations and the structure of Zn-41(30)71

Bottoni, S; Zhu, S; Janssens, R; Carpenter, MP; Tsunoda, Y; Otsuka, T; Macchiavelli, AO; Cline, D; Wu, CY; Ayangeakaa, A; Bucher, B; Buckner, M; Campbell, CM; Chiara, CJ; Crawford, HL; Cromaz, M; David, HM; Fallon, P; Gade, A; Greene, JP; Harker, J; Hayes, AB; Hoffman, CR; Kay, BP; Korichi, A; Lauritsen, T; Sethi, J; Seweryniak, D; Walters, WB; Weisshaar, D; Wiens, A

doi:10.1016/j.physletb.2017.11.003

Nucleon correlations and the structure of Zn-41(30)71

Author:

Bottoni, S

Zhu, S ; Janssens, R ; Carpenter, MP ; Tsunoda, Y ; Otsuka, T ; Macchiavelli, AO ; Cline, D ; Wu, CY ; Ayangeakaa, A ; Bucher, B ; Buckner, M ; Campbell, CM ; Chiara, CJ ; Crawford, HL ; Cromaz, M ; David, HM ; Fallon, P ; Gade, A ; Greene, JP ; Harker, J ; Hayes, AB ; Hoffman, CR ; Kay, BP ; Korichi, A ; Lauritsen, T ; Sethi, J ; Seweryniak, D ; Walters, WB ; Weisshaar, D ; Wiens, A

Keywords:

Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Nuclear, Physics, Particles & Fields, Physics, GRETINA, ARRAY, 0105 Mathematical Physics, 0201 Astronomical and Space Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 49 Mathematical sciences, 51 Physical sciences

Abstract:

© 2017 The Author(s) The structure of 71Zn was investigated by one-neutron transfer and heavy-ion induced complex (deep-inelastic) reactions using the GRETINA-CHICO2 and the Gammasphere setups, respectively. The observed inversion between the 9/2+ and 1/2− states is explained in terms of the role of neutron pairing correlations. Non-collective sequences of levels were delineated above the 9/2+ isomeric state. These are interpreted as being associated with a modest oblate deformation in the framework of Monte-Carlo shell-model calculations carried out with the A3DA-m Hamiltonian in the pfg9/2d5/2 valence space. Similarities with the structure of Ni402868 were observed and the shape-coexistence mechanism in the N=40 region of neutron-rich nuclei is discussed in terms of the so-called Type-II shell evolution, with an emphasis on proton–neutron correlations between valence nucleons, especially those involving the shape-driving g9/2 neutron orbital.