{
  "annotation_id": "6d8f8d0d-393e-48ee-9dc3-f13913cd9276",
  "date_created": "2026-03-02T18:02:34.424000Z",
  "date_modified": "2026-03-02T18:02:34.424000Z",
  "file_hash": "c933b4a37164c4131f9b2649c9025b822b5f63f1a3b950c4791db4c0698abc42",
  "private": false,
  "record": {
    "abstract": "We have recorded the Doppler profile of a well-isolated rovibrational line in\nthe \\nu2 band of 14NH3. Ammonia gas was placed in an absorption cell\nthermalized by a water-ice bath. By extrapolating to zero pressure, we have\ndeduced the Doppler width which gives a first measurement of the Boltzmann\nconstant, kB, by laser spectroscopy. A relative uncertainty of 2x10-4 has been\nobtained. The present determination should be significantly improved in the\nnear future and contribute to a new definition of the kelvin.",
    "arxiv_id": "quant-ph/0701176",
    "authors": [
      "Christophe Daussy",
      "Mickael Guinet",
      "Anne Amy-Klein",
      "Khelifa Djerroud",
      "Yves Hermier",
      "Stephan Briaudeau",
      "Christian J. Bord\u00e9",
      "Christian Chardonnet"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.98.250801",
    "journal_ref": "Physical Review Letters 98 (2007) 250801",
    "title": "First direct determination of the Boltzmann constant by an optical   method",
    "url": "https://arxiv.org/abs/quant-ph/0701176"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8e96904f-816f-4780-a15b-c0ac1e83d9b7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}