{
  "annotation_id": "b5eacce9-c4cc-4076-b2e3-0e1172d14d23",
  "date_created": "2026-03-02T18:00:49.899000Z",
  "date_modified": "2026-03-02T18:00:49.899000Z",
  "file_hash": "0111d4d88fb062ec98c112c3a817a47b5cd11014127976e0a8ad46ad8103ad9d",
  "private": false,
  "record": {
    "abstract": "We perform accurate calculations of the dependence of transition frequencies\nin two valence electron atoms and ions on a variation of the fine structure\nconstant, alpha. The relativistic Hartree-Fock method is used with many-body\nperturbation theory and configuration interaction methods to calculate\ntransition frequencies. The results are to be used in atomic-clock-type\nlaboratory experiments designed to test whether alpha varies in time.",
    "arxiv_id": "physics/0404042",
    "authors": [
      "E. J. Angstmann",
      "V. A. Dzuba",
      "V. V. Flambaum"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.70.014102",
    "journal_ref": "Phys.Rev.A70:014102,2004",
    "title": "Relativistic effects in two valence electron atoms and ions and the   search for variation of the fine structure constant",
    "url": "https://arxiv.org/abs/physics/0404042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7695182c-a184-4af6-ba0a-5f93ec1f119e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}