{
  "abstract": "Mass measurements of the ground and isomeric states of $^{68-70}$Co have been performed using the JYFLTRAP Penning-trap mass spectrometer at the IGISOL facility. The masses were measured, either for the first time for the isomeric states of $^{68}$Co and $^{70}$Co, or with greatly improved precision for the others, removing ambiguities in the mass surface beyond $N=40$. The ordering of the low and high-spin states in $^{68}$Co and $^{70}$Co has also been established. The results, supported by Large-Scale Shell Model and Discrete Non-Orthogonal Shell-Model calculations, show a gradual lowering of intruder states with increasing neutron number, eventually leading to an inversion in $^{70}$Co. These findings clarify previously proposed contradictory interpretations. Finally, we demonstrate the importance of including induced effective 3N forces for a consistent description of binding energies in the island of inversion near $N=40$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.10754",
  "author_total": 22,
  "authors": [
    {
      "name": "M Flayol"
    },
    {
      "name": "P Ascher"
    },
    {
      "name": "D.D Dao"
    },
    {
      "name": "M Gerbaux"
    },
    {
      "name": "S Grévy"
    },
    {
      "name": "F Nowacki"
    },
    {
      "name": "A de Roubin"
    },
    {
      "name": "D Atanasov"
    },
    {
      "name": "B Blank"
    },
    {
      "name": "L Canete"
    },
    {
      "name": "Q Délignac"
    },
    {
      "name": "T Eronen"
    },
    {
      "name": "Z Ge"
    },
    {
      "name": "M Hukkanen"
    },
    {
      "name": "A Jaries"
    },
    {
      "name": "A Kankainen"
    },
    {
      "name": "I.D Moore"
    },
    {
      "name": "M Mougeot"
    },
    {
      "name": "A Raggio"
    },
    {
      "name": "J Ruotsalainen"
    },
    {
      "name": "M Stryjczyk"
    },
    {
      "name": "V Virtanen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/06kn8r4d2pxsw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.10754",
  "fulltext_url": null,
  "id": "06kn8r4d2pxsw",
  "issns": [],
  "landing_url": "https://hal.science/hal-05759230v1",
  "language": "en",
  "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-ex"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.nexp"
    ],
    [
      "openalex",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7212255096",
  "pdf_url": "https://arxiv.org/pdf/2609.10754",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/06kn8r4d2pxsw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:37Z",
      "native_id": "hal-05759230",
      "source": "hal",
      "url": "https://hal.science/hal-05759230v1"
    },
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.10754",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.10754"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-ex",
      "subfield": "nuclear"
    }
  ],
  "title": "Island of Inversion in neutron-rich cobalt isotopes revealed from mass measurements",
  "title_text": "Island of Inversion in neutron-rich cobalt isotopes revealed from mass measurements",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/06kn8r4d2pxsw",
  "venue": "HAL",
  "versions": []
}