{
  "annotation_id": "8f645fe6-1961-46b0-a7f9-ca3d9f547bde",
  "date_created": "2026-03-02T18:00:32.438000Z",
  "date_modified": "2026-03-02T18:00:32.438000Z",
  "file_hash": "d9a62340234e4d764f3d7655da234436194cdb2d3cdd729d0204eb33337b38f0",
  "private": false,
  "record": {
    "abstract": "Correction to the hyperfine constant $A$ of an external s-electron in\nmany-electron atom caused by the Breit interaction is calculated analytically:\n$\\delta A/A =0.68 Z\\alpha^2$. Physical mechanism for this correction is\npolarization of the internal electronic shells (mainly $1s^2$ shell) by the\nmagnetic field of the external electron. This mechanism is similar to the\npolarization of vacuum considered by Karplus and Klein long time ago. The\nsimilarity is the reason why in both cases (Dirac sea polarization and internal\natomic shells polarization) the corrections have the same dependence on the\nnuclear charge and fine structure constant.\n  In conclusion we also discuss $Z\\alpha^2$ corrections to the parity violation\neffects in atoms.",
    "arxiv_id": "physics/0010028",
    "authors": [
      "O. P. Sushkov"
    ],
    "categories": [
      "physics.atom-ph",
      "hep-ph",
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevA.63.042504",
    "journal_ref": "Phys.Rev.A63:042504,2001",
    "title": "Breit interaction correction to the hyperfine constant of an external   s-electron in many-electron atom",
    "url": "https://arxiv.org/abs/physics/0010028"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e898d4d4-1223-4988-89e6-912da1eb8420",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}