{
  "annotation_id": "4f659729-fb4e-4c3b-9e9f-76cc64c9fc78",
  "date_created": "2026-03-02T18:00:36.117000Z",
  "date_modified": "2026-03-02T18:00:36.117000Z",
  "file_hash": "8fb7e55d46c2616fa8cb96da43ad12644fa094597c564e75f87471d288ab4c07",
  "private": false,
  "record": {
    "abstract": "Relativistic corrections to the hyperfine splitting are calculated for the\ntriplet $2^3S_1$ state of the helium isotope He$^3$. High precision variational\nwave functions are employed, where the electron-electron correlations are well\naccounted for. Due to the unknown nuclear structure a comparison with the\nexperimental result is performed via He$^{3+}$ hyperfine splitting.\nSurprisingly, the second order contribution due to Fermi interaction, in spite\nof the additional small factor $m/M$, is very significant.",
    "arxiv_id": "physics/0103079",
    "authors": [
      "Krzysztof Pachucki"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1088/0953-4075/34/16/311",
    "title": "Hyperfine splitting of $2^3S_1$ state in He$^3$",
    "url": "https://arxiv.org/abs/physics/0103079"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d8d45d8a-d4bc-47ff-94c7-a58932f77f21",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}