{
  "annotation_id": "2dfc9d7f-6f1d-4137-8632-4e2a96ad6607",
  "date_created": "2026-03-02T18:00:46.169000Z",
  "date_modified": "2026-03-02T18:00:46.169000Z",
  "file_hash": "4e936796dde2991211c1b67aede5f51527c37a0d5050ab6570c1366304f76656",
  "private": false,
  "record": {
    "abstract": "We report the direct frequency measurement of the visible 5s$^2$ $^1$S$_0$-5s\n5p$^3$P$_1$ intercombination line of strontium that is considered a possible\ncandidate for a future optical frequency standard. The frequency of a\ncavity-stabilized laser is locked to the saturated fluorescence in a thermal Sr\natomic beam and is measured with an optical-frequency comb-generator referenced\nto the SI second through a GPS signal. The $^{88}$Sr transition is measured to\nbe at 434 829 121 311 (10) kHz. We measure also the $^{88}$Sr-$^{86}$Sr isotope\nshift to be 163 817.4 (0.2) kHz.",
    "arxiv_id": "physics/0309014",
    "authors": [
      "G. Ferrari",
      "P. Cancio",
      "R. Drullinger",
      "G. Giusfredi",
      "N. Poli",
      "M. Prevedelli",
      "C. Toninelli",
      "G. M. Tino"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.91.243002",
    "journal_ref": "Phys. Rev. Lett. 91, 243002 (2003)",
    "title": "Precision frequency measurement of visible intercombination lines of   strontium",
    "url": "https://arxiv.org/abs/physics/0309014"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2dd6f5d4-9c6a-41d9-a76d-78e2d0f6fcac",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}