{
  "annotation_id": "9e892b21-6986-42be-9797-45acd6eaca32",
  "date_created": "2026-03-02T18:01:20.659000Z",
  "date_modified": "2026-03-02T18:01:20.659000Z",
  "file_hash": "005ec3c134ffe1fa368d66d54e7479114d53fd76a6a78cea63dbbd3959696fe7",
  "private": false,
  "record": {
    "abstract": "The hyperfine structure of 5snd ^1D_2 states in ^{87}Sr was studied for\nprincipal quantum numbers 11 \u003c= n \u003c= 25 by Doppler-free two-photon excitation\ncombined with thermionic detection. Based on the more accurate data, compared\nto previous results, the hyperfine structure was analysed by second order\nperturbation theory using MQDT wavefunctions. As a result we find that the\nsurprisingly large B-factors obtained by fitting the data with the Casimir\nformula do not reflect a quadrupolar interaction but rather consist\npredominantly of second order magnetic dipole contributions. Further,\ninconsistencies in the King plot of odd-even isotope shifts were removed by\nthis type of analysis. The result demonstrates the importance of higher order\neffects in hyperfine splittings of excited states in atoms with two valence\nelectrons, even when the fine structure splitting is large compared to the\nhyperfine splitting.",
    "arxiv_id": "physics/9706010",
    "authors": [
      "J. Guedde",
      "A. Klinkmueller",
      "P. J. West",
      "E. Matthias"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.47.4725",
    "journal_ref": "Phys. Rev. A, 47(6), (June 1993), pages 4725-4734",
    "title": "Second-order magnetic contributions to the hyperfine splitting of the   5snd ^1D_2 states in ^87Sr",
    "url": "https://arxiv.org/abs/physics/9706010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b5a7f4e0-8116-43fc-8660-ba1d05fa7196",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}