{
  "annotation_id": "f3acb71e-e9b2-40ea-8b9d-fc10842b0d0b",
  "date_created": "2026-03-02T18:00:31.751000Z",
  "date_modified": "2026-03-02T18:00:31.751000Z",
  "file_hash": "85f7f10de01adcc6d733c4a855ee8850a43d8a1db2ec4a4f0f5a76c8cf7f636b",
  "private": false,
  "record": {
    "abstract": "Theoretical model of the nuclear spin conversion in formaldehyde (H2CO) has\nbeen developed. The conversion is governed by the intramolecular spin-rotation\nmixing of molecular ortho and para states. The rate of conversion has been\nfound equal 1.4*10^{-4}~1/s*Torr. Temperature dependence of the spin conversion\nhas been predicted to be weak in the wide temperature range T=200-900 K.",
    "arxiv_id": "physics/0009070",
    "authors": [
      "Pavel L. Chapovsky"
    ],
    "categories": [
      "physics.chem-ph",
      "physics.atom-ph"
    ],
    "doi": "10.1016/S0022-2860(01)00854-7",
    "journal_ref": "J. Molecular Structure v.599, 337 (2001)",
    "title": "Nuclear spin conversion in formaldehyde",
    "url": "https://arxiv.org/abs/physics/0009070"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6826d7b3-e09a-49c2-a7c4-db94b6cb71c7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}