{
  "annotation_id": "6d6ad850-2b43-481e-beb4-08046de79305",
  "date_created": "2026-03-02T18:00:29.416000Z",
  "date_modified": "2026-03-02T18:00:29.416000Z",
  "file_hash": "705bcef95389efc5f9be77f8fcea5fb15620c0e691618e4badeb6a8e4dbd6115",
  "private": false,
  "record": {
    "abstract": "We study beams of medium-energy electrons and positrons which obey the Dirac\nequation and scatter from nuclei with $Z \u003e 100.$ At small distances the\npotential is modelled to be that of a charged sphere. A large peak is found in\nthe probability of positron penetration to the origin for $Z \\approx 184.$ This\nmay be understood as an example of Klein tunnelling through the Coulomb\nbarrier: it is the analogue of the Klein Paradox for the Coulomb potential.",
    "arxiv_id": "nucl-th/9912076",
    "authors": [
      "Norman Dombey",
      "Richard L. Hall"
    ],
    "categories": [
      "nucl-th",
      "math-ph",
      "math.MP",
      "quant-ph"
    ],
    "doi": "10.1016/S0370-2693(00)00016-2",
    "journal_ref": "Phys.Lett. B474 (2000) 1-6",
    "title": "Positron Tunnelling through the Coulomb Barrier of Superheavy Nuclei",
    "url": "https://arxiv.org/abs/nucl-th/9912076"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "86304a21-5e11-49f5-92c5-9a20ebc9ebaa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}