Shape and shell structure of lighter (N90) neutron-rich nuclei based on a phenomenological Woods-Saxon potential

Ikuko Hamamoto
Phys. Rev. C 99, 024319 – Published 25 February 2019

Abstract

By using a phenomenologically successful Woods-Saxon potential, I study the shape and shell structure of (A) neutron drip line nuclei with 10N60, (B) neutron-rich nuclei related to the r process with 40N90, 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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  • Received 9 October 2018

DOI:https://doi.org/10.1103/PhysRevC.99.024319

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Ikuko Hamamoto

  • Riken Nishina Center, Wako, Saitama 351-0198, Japan and Division of Mathematical Physics, Lund Institute of Technology at the University of Lund, Lund S-22100, Sweden

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Issue

Vol. 99, Iss. 2 — February 2019

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