{
  "annotation_id": "8a8b1736-521e-4411-99f7-2d3d8d8d4d5a",
  "date_created": "2026-03-02T18:00:11.609000Z",
  "date_modified": "2026-03-02T18:00:11.609000Z",
  "file_hash": "8bb5488ac5c3ffaa4bc23d9bdb7e066548ff7bb2c2c65953a83bdd3b98e394e8",
  "private": false,
  "record": {
    "abstract": "It has been shown recently that a simple formula in terms of the valence\nnucleon numbers and the mass number can describe the essential trends of\nexcitation energies of the first $2^+$ states in even-even nuclei. By\nevaluating the first order energy shift due to the zero-range residual\ninteraction, we find that the factor which reflects the effective particle\nnumber participating in the interaction from the Fermi orbit governs the main\ndependence of the first $2^+$ excitation energy on the valence nucleon numbers.",
    "arxiv_id": "nucl-th/0703035",
    "authors": [
      "Eunja Ha",
      "Dongwoo Cha"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.75.057304",
    "journal_ref": "Phys.Rev.C75:057304,2007",
    "title": "Origin of $2_1^+$ Excitation Energy Dependence on Valence Nucleon   Numbers",
    "url": "https://arxiv.org/abs/nucl-th/0703035"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "89dad13f-ad7c-4026-a659-1f4ced823c28",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}