{
  "annotation_id": "3b304522-6800-4b88-85c8-94347dd8ddae",
  "date_created": "2026-03-02T18:00:53.690000Z",
  "date_modified": "2026-03-02T18:00:53.690000Z",
  "file_hash": "e5a5162829c309e1e3418f3ed32bc8de0e0ade79571baef53fcc1ac727938dd0",
  "private": false,
  "record": {
    "abstract": "We report the frequency measurement with an accuracy in the 100 kHz range of\nseveral optical transitions of atomic Sr : $^1S_0- ^3P_1$ at 689 nm, $^3P_1-\n^3S_1$ at 688 nm and $^3P_0- ^3S_1$ at 679 nm. Measurements are performed with\na frequency chain based on a femtosecond laser referenced to primary frequency\nstandards. They allowed the indirect determination with a 70 kHz uncertainty of\nthe frequency of the doubly forbidden $5s^2^1S_0- 5s5p^3P_0$ transition of\n$^{87}$Sr at 698 nm and in a second step its direct observation. Frequency\nmeasurements are performed for $^{88}$Sr and $^{87}$Sr, allowing the\ndetermination of $^3P_0$, $^3P_1$ and $^3S_1$ isotope shifts, as well as the\n$^3S_1$ hyperfine constants.",
    "arxiv_id": "physics/0410108",
    "authors": [
      "Irene Courtillot",
      "Audrey Quessada-Vial",
      "Anders Brusch",
      "Dmitri Kolker",
      "Giovanni D. Rovera",
      "Pierre Lemonde"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1140/epjd/e2005-00058-0",
    "title": "Accurate spectroscopy of Sr atoms",
    "url": "https://arxiv.org/abs/physics/0410108"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c4b1ec30-39bd-46d5-b3d4-29a8d2b61535",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}