{
  "annotation_id": "5f313eda-77e4-4bcc-acf9-f1fbc68b7497",
  "date_created": "2026-03-02T18:01:24.099000Z",
  "date_modified": "2026-03-02T18:01:24.099000Z",
  "file_hash": "484b312c2734e1dffca8a0bbdcd64f0f79ed245b5287bdd257daf1433e0db4e6",
  "private": false,
  "record": {
    "abstract": "The influence of negative-energy states (NES) on forbidden magnetic-dipole\n$ns_{1/2}-(n+1)s_{1/2}$ transitions in alkali-metal atoms is investigated. We\nfind that the NES contributions are significant in almost all cases and for\nrubidium reduce the transition rate by a factor of 8. We tabulate\nmagnetic-dipole (M_1) transition amplitudes for the alkalis. Our M_1 value for\ncesium, where accurate measurements are available, differs from experiment by\n16%. We briefly discuss the feasibility of an experimental test of NES effects.",
    "arxiv_id": "physics/9905043",
    "authors": [
      "I. M. Savukov",
      "A. Derevianko",
      "H. G. Berry",
      "W. R. Johnson"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.83.2914",
    "title": "Large Contributions of Negative Energy States to Forbidden   Magnetic-Dipole Transition Amplitudes in Alkali-Metal Atoms",
    "url": "https://arxiv.org/abs/physics/9905043"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "83b97d47-6202-43f4-8e4e-cd05ebef06d2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}