{
  "annotation_id": "b9762991-8ee2-4858-87ab-a1b65abf262f",
  "date_created": "2026-03-02T18:00:49.110000Z",
  "date_modified": "2026-03-02T18:00:49.110000Z",
  "file_hash": "37a7167e10b8c70eb7427e20403536b902c6d3e65c3cad994dc7c8a7692022b5",
  "private": false,
  "record": {
    "abstract": "New results are presented for Ps(1s) scattering by H(1s), He(1$^1$S) and\nLi(2s). Calculations have been performed in a coupled state framework, usually\nemploying pseudostates, and allowing for excitation of both the Ps and the\natom. In the Ps(1s)-H(1s) calculations the H$^-$ formation channel has also\nbeen included using a highly accurate H$^-$ wave function. Resonances resulting\nfrom unstable states in which the positron orbits H$^-$ have been calculated\nand analysed. The new Ps(1s)-He(1$^1$S) calculations still fail to resolve\nexisting discrepancies between theory and experiment at very low energies. The\npossible importance of the Ps$^-$ formation channel in all three collision\nsystems is discussed.",
    "arxiv_id": "physics/0401125",
    "authors": [
      "H R J Walters",
      "A C H Yu",
      "S Sahoo",
      "Sharon Gilmore"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1016/j.nimb.2004.03.047",
    "title": "Positronium-Atom Collisions",
    "url": "https://arxiv.org/abs/physics/0401125"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "07bdfcc4-ce87-426b-a907-08628a01bd0d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}