{
  "annotation_id": "4ebf563b-a7aa-441d-b63b-910c16820475",
  "date_created": "2026-03-02T18:00:57.415000Z",
  "date_modified": "2026-03-02T18:00:57.415000Z",
  "file_hash": "eacf84bb1c56cf48a90b2d8350afbb2a7e3932c226869f16a3cf0d57b7f66aed",
  "private": false,
  "record": {
    "abstract": "A new method for measuring a possible time dependence of the fine-structure\nconstant ($\\alpha$) is proposed. The method is based on the level-crossing in\ntwo-electron highly-charged ions facilitating resonance laser measurements of\nthe distance between the levels at the point of crossing. This provides an\nenhancement factor of about $10^{3}$ in Helium-like Europium and thus reduces\nthe requirements for the relative accuracy of resonance laser measurements at\nabout $10^{-12}$.",
    "arxiv_id": "physics/0505081",
    "authors": [
      "O. Yu. Andreev",
      "L. N. Labzowsky",
      "G. Plunien",
      "G. Soff"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.94.243002",
    "title": "Testing the time dependence of the fundamental constants in the spectra   of multicharged ions",
    "url": "https://arxiv.org/abs/physics/0505081"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4b9a9a92-4868-48c6-98fb-f861cdac5393",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}