4.7 Article

Nucleon correlations and the structure of 7130Zn41

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PHYSICS LETTERS B
卷 775, 期 -, 页码 271-276

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ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2017.11.003

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  1. U.S. Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357, DE-AC02-05CH11231, DE-AC52-07NA27344, DE-FG02-94ER40834, DE-FG02-08ER41556]
  2. NSF [PHY-1102511]
  3. Priority Issue on post-K Computer (Elucidation of the Fundamental Laws and Evolution of the Universe) from MEXT
  4. JICFuS
  5. U.S. DOE Office of Science, Office of Nuclear Physics by the ANL
  6. U.S. DOE Office of Science, Office of Nuclear Physics by the LBNL
  7. HPCI strategic program (The Origin of Matter and the Universe)

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The structure of Zn-71 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 pfg(9/2)d(5/2) valence space. Similarities with the structure of Ni-68(28)40 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-IIshell evolution, with an emphasis on proton-neutron correlations between valence nucleons, especially those involving the shape-driving g(9/2) neutron orbital. (C) 2017 The Author(s). Published by Elsevier B.V.

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