{
  "annotation_id": "ee37c608-641e-4a45-9812-62458b98e074",
  "date_created": "2026-03-02T18:00:43.478000Z",
  "date_modified": "2026-03-02T18:00:43.478000Z",
  "file_hash": "812165cfd88ee4ef88376b7311cd917019f503a23aae00ba3c8065d15ab434f4",
  "private": false,
  "record": {
    "abstract": "We report the first direct excitation of the strongly forbidden 5s2 1S0-5s5p\n3P0 transition in 87Sr. Its frequency is 429 228 004 235 (20) kHz. A resonant\nlaser creates a small leak in a magneto-optical trap (MOT): atoms build up to\nthe metastable 3P0 state and escape the trapping process, leading to a\ndetectable decrease in the MOT fluorescence. This line has a natural width of\n10^{-3} Hz and can be used for a new generation of optical frequency standards\nusing atoms trapped in a light shift free dipole trap.",
    "arxiv_id": "physics/0303023",
    "authors": [
      "I. Courtillot",
      "A. Quessada",
      "R. P. Kovacich",
      "A. Brusch",
      "D. Kolker",
      "J-J. Zondy",
      "G. D. Rovera",
      "P. Lemonde"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.68.030501",
    "journal_ref": "Phys. Rev. A 68, 030501(R) (2003)",
    "title": "A clock transition for a future optical frequency standard with trapped   atoms",
    "url": "https://arxiv.org/abs/physics/0303023"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8407a265-e998-43b8-bb22-b4bb6be108b9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}