{
  "annotation_id": "b4545550-66ae-460b-8bce-34a6078c0c62",
  "date_created": "2026-03-02T18:00:32.075000Z",
  "date_modified": "2026-03-02T18:00:32.075000Z",
  "file_hash": "92f1c99025ef518825bd62b7be734a4f86f8e3ea054da0d6cc54b0410faa97f4",
  "private": false,
  "record": {
    "abstract": "We determined the ionic and electronic structure of sodium clusters with even\nelectron numbers and 2 to 59 atoms in axially averaged and three-dimensional\ndensity functional calculations. A local, phenomenological pseudopotential that\nreproduces important bulk and atomic properties and facilitates structure\ncalculations has been developed. Photoabsorption spectra have been calculated\nfor $\\mathrm{Na}_2$, $\\mathrm{Na}_8$, and $\\mathrm{Na}_9^+$ to\n$\\mathrm{Na}_{59}^+$. The consistent inclusion of ionic structure considerably\nimproves agreement with experiment. An icosahedral growth pattern is observed\nfor $\\mathrm{Na}_{19}^+$ to $\\mathrm{Na}_{59}^+$. This finding is supported by\nphotoabsorption data.",
    "arxiv_id": "physics/0007018",
    "authors": [
      "S. K\u00fcmmel",
      "M. Brack",
      "P. -G. Reinhard"
    ],
    "categories": [
      "physics.atm-clus",
      "cond-mat.mtrl-sci",
      "physics.chem-ph"
    ],
    "doi": "10.1103/PhysRevB.62.7602",
    "journal_ref": "Phys.Rev. B 62, 7602 (2000)",
    "title": "Ionic and electronic structure of sodium clusters up to N=59",
    "url": "https://arxiv.org/abs/physics/0007018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a86f0e9f-8696-49f6-9ffd-17566961a613",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}