{
  "annotation_id": "5e1e8a5b-afba-4289-b3aa-b321a9269d9d",
  "date_created": "2026-03-02T18:00:05.026000Z",
  "date_modified": "2026-03-02T18:00:05.026000Z",
  "file_hash": "aeab898fb7420372d09c5717d840a60978fb98a4dfae5d1bda551ec1de6b100e",
  "private": false,
  "record": {
    "abstract": "The study of the hyperfine anomaly of neutron rich nuclei, in particular,\nneutron halo nuclei, can give a very specific and unique way to measure their\nneutron distribution and confirm a halo structure. The hyperfine structure\nanomaly in Be+ ions is calculated with a realistic electronic wave function,\nobtained as a solution of the Dirac equation. In the calculations, the Coulomb\npotential modified by the charge distribution of the clustered nucleus and\nthree electrons in the 1s^2 2s configuration is used. The nuclear wave function\nis obtained in the core+nucleon model of 9,11Be. The aim of this study is to\ntest whether the hyperfine structure anomaly reflects a halo structure in 11Be.",
    "arxiv_id": "nucl-th/0502032",
    "authors": [
      "Y. L. Parfenova",
      "Ch. Leclercq-Willain"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.72.024312",
    "journal_ref": "Phys.Rev.C72:024312,2005",
    "title": "Hyperfine anomaly in Be isotopes in the cluster model and the neutron   spatial distribution",
    "url": "https://arxiv.org/abs/nucl-th/0502032"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5efc131a-8b60-4ace-a770-c4a75f054d47",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}