{
  "annotation_id": "590731b0-a56d-47ba-94d5-b9b96cdc85c4",
  "date_created": "2026-03-02T18:01:07.359000Z",
  "date_modified": "2026-03-02T18:01:07.359000Z",
  "file_hash": "cdede089f4ef72289428d58e9aa68c1ae538116beb76c53b4bf24c5a56de7bd1",
  "private": false,
  "record": {
    "abstract": "The properties of the least-bound vibrational level (v=14) of the quintet\nsigma state formed during the ultracold collision of two spin-polarized\nmetastable helium atoms are crucial to studies of photoassociation spectroscopy\nof metastable helium. We report a calculation of the autoionization lifetime of\nthis state induced by spin-dipole coupling of the quintet sigma state to the\nsinglet sigma state from which Penning and associative ionization processes are\nhighly probable. We find a lifetime of about 150 microseconds, significantly\nlarger than the recent experimental estimates of (4-5) microseconds.",
    "arxiv_id": "physics/0604189",
    "authors": [
      "Timothy J. Beams",
      "Gillian Peach",
      "Ian B. Whittingham"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.74.014702",
    "title": "Spin-dipole induced lifetime of the least-bound quintet sigma state of   He(2S)+He(2S)",
    "url": "https://arxiv.org/abs/physics/0604189"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "888c5a9a-de9a-4053-bbdb-b9847a719f9d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}