{
  "annotation_id": "85bc39eb-42d4-4470-b20d-0ab83a417f4a",
  "date_created": "2026-03-02T18:01:25.084000Z",
  "date_modified": "2026-03-02T18:01:25.084000Z",
  "file_hash": "f8ef09ed991ff482a38c30733660a6596cb8fdfd172b78a446bae9b6add3f7a1",
  "private": false,
  "record": {
    "abstract": "Removal energies and hyperfine constants of the lowest four $ns, np_{1/2}$\nand $np_{3/2}$ states in Na, K, Rb and Cs are calculated; removal energies of\nthe n=7--10 states and hyperfine constants of the n=7 and 8 states in Fr are\nalso calculated. The calculations are based on the relativistic single-double\n(SD) approximation in which single and double excitations of Dirac-Hartree-Fock\n(DHF) wave functions are included to all-orders in perturbation theory. Using\nSD wave functions, accurate values of removal energies, electric-dipole matrix\nelements and static polarizabilities are obtained, however, SD wave functions\ngive poor values of magnetic-dipole hyperfine constants for heavy atoms. To\nobtain accurate values of hyperfine constants for heavy atoms, we include\ntriple excitations partially in the wave functions. The present calculations\nprovide the basis for reevaluating PNC amplitudes in Cs and Fr.",
    "arxiv_id": "physics/9906044",
    "authors": [
      "M. S. Safronova",
      "W. R. Johnson",
      "A. Derevianko"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.60.4476",
    "title": "Relativistic many-body calculations of energy levels, hyperfine   constants, electric-dipole matrix elements and static polarizabilities for   alkali-metal atoms",
    "url": "https://arxiv.org/abs/physics/9906044"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "496ab97d-b9ae-48a5-af8e-f8fc380999e5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}