Shape and shell structure of lighter (N?90) neutron-rich nuclei based on a phenomenological Woods-Saxon potential

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Abstract

By using a phenomenologically successful Woods-Saxon potential, I study the shape and shell structure of (A) neutron drip line nuclei with 10≤N≤60, (B) neutron-rich nuclei related to the r process with 40≤N≤90, and (C) one-particle spectra in the potential provided by the nucleus Fe70 as a representative of so-called N=40 "island of inversion" (IoI) nuclei. First, the shell structure that is unique in very weakly bound neutrons is systematically studied, and the approximate neutron number of odd-N nuclei at which spherical (or deformed) halos can be found is pinned down. Second, the difference of the shell structure in r-process nuclei from that in stable nuclei is examined. Third, the similarity and the difference between the shell structure of N=20 IoI nuclei and that of N=40 IoI nuclei are analyzed. As a result, it is concluded that in Fe and Cr isotopes the deformation called "N=40 IoI" continuing up to N=50 is unlikely.

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Authors
Organisations
External organisations
  • RIKEN Nishina Center for Accelerator-Based Science
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number024319
JournalPhysical Review C
Volume99
Issue number2
Publication statusPublished - 2019 Feb 25
Publication categoryResearch
Peer-reviewedYes