{
  "annotation_id": "79f0b694-99b5-4b47-b5c2-9b3a23957915",
  "date_created": "2026-03-02T18:00:57.217000Z",
  "date_modified": "2026-03-02T18:00:57.217000Z",
  "file_hash": "aea3454fab2b0f8fb6a614c78cbd80efa45fba112ea62e41bb6790834bc69234",
  "private": false,
  "record": {
    "abstract": "We outline a non-perturbative procedure for calculating the total\nphotoionization cross-section of two-electron atomic systems. The procedure is\nbased on the Floquet-Fourie representation of the solution of the\ntime-dependent Schrodinger equation. The Floquet-Fourie ansatz produces a set\nof equations which is recast into a generalized eigenvalue problem by means of\nthe complex rotation procedure. With the use of the Hylleraas-type basis\nfunctions, the total photoionization cross-sections are obtained within the\naccuracy of a fraction of a percent. The total photoionization cross-sections\nfor neutral helium are in good agreement with the convergent close-coupling\ncalculations of Kheifets and Bray [Phys. Rev. A {\\bf 58}, 4501 (1999)] but\ndeviate notably from the experimental data of Samson {\\em et al.} [J. Phys. B\n{\\bf 27} 887 (1994)].",
    "arxiv_id": "physics/0502018",
    "authors": [
      "I. A. Ivanov",
      "A. S. Kheifets"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "title": "Calculations of total photoionization cross-section for^M two-electron   atomic systems",
    "url": "https://arxiv.org/abs/physics/0502018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "df5f4f14-20ef-48ac-b927-c1685a2892d4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}