{
  "abstract": "Predictions for the systematics of low-lying states in neutron-rich $N=50$ isotones from \\nuclide[80]{Zn} to \\nuclide[70]{Ca}, where experimental information remains scarce, exhibit substantial model dependence. We investigate these nuclei using multi-reference covariant density functional theory based on a relativistic energy density functional, in which nuclear wave functions are constructed as superpositions of symmetry-restored mean-field states with different quadrupole deformations. The low-lying states of \\nuclide[78]{Ni} are reasonably reproduced, and a prolate rotational band built on the second $0^+$ state is predicted in addition to a near-spherical ground state. As the proton number decreases toward $Z=20$, the low-energy structure exhibits a nonmonotonic evolution from spherical to strongly deformed and subsequently back to spherical shapes, consistent with valence-space shell-model predictions. In particular, the emergence of deformed ground states in \\nuclide[76]{Fe} and \\nuclide[74]{Cr} is accompanied by enhanced quadrupole collectivity and stronger shape mixing. The results provide a coherent microscopic description of the structural evolution from the doubly magic \\nuclide[78]{Ni} to the neutron-rich $N=50$ isotones.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.01364",
  "author_total": 6,
  "authors": [
    {
      "name": "X. Y. Wu"
    },
    {
      "name": "M. L. Mai"
    },
    {
      "name": "D. Q. Zhu"
    },
    {
      "name": "W. H. Liu"
    },
    {
      "name": "Z. M. Liu"
    },
    {
      "name": "J. Xiang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/73c3ck2dgvmfk.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.01364",
  "fulltext_url": null,
  "id": "73c3ck2dgvmfk",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.01364",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7206199673",
  "pdf_url": "https://arxiv.org/pdf/2609.01364",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/73c3ck2dgvmfk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:00Z",
      "native_id": "2609.01364",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.01364"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Low-lying states of neutron-rich $N=50$ isotones in multi-reference covariant density functional theory",
  "title_text": "Low-lying states of neutron-rich N=50 isotones in multi-reference covariant density functional theory",
  "type": "preprint",
  "updated_at": "2026-11-04T15:21:24Z",
  "url": "https://research.draconitic.com/paper/73c3ck2dgvmfk",
  "venue": "arXiv",
  "versions": []
}