{
  "annotation_id": "52b3fbbb-40d2-4b2c-a7f0-37fdae0e921f",
  "date_created": "2026-03-02T18:00:50.486000Z",
  "date_modified": "2026-03-02T18:00:50.486000Z",
  "file_hash": "d856aadc6454f70bf8a97b5e7134786c30e105f9d1f70846e34ce72e7daa7038",
  "private": false,
  "record": {
    "abstract": "We have observed several new spectral features in the fluorescence of cesium\natoms implanted in the hcp phase of solid helium following laser excitation to\nthe 6$^{2}$P states. Based on calculations of the emission spectra using\nsemiempirical Cs-He pair potentials the newly discovered lines can be assigned\nto the decay of specific Cs*He$_{n}$ exciplexes: an apple-shaped Cs$(A\\Pi\n_{3/2})$He$_{2}$ and a dumbbell-shaped Cs$(A\\Pi_{1/2}) $He$_{n}$ exciplex with\na well defined number $n$ of bound helium atoms. While the former has been\nobserved in other enviroments, it was commonly believed that exciplexes with\n$n\u003e2$ might not exist. The calculations suggest Cs$(A\\Pi_{1/2}) $He$_{6}$ to be\nthe most probable candidate for that exciplex, in which the helium atoms are\narranged on a ring around the waist of the dumbbell shaped electronic density\ndistribution of the cesium atom.",
    "arxiv_id": "physics/0407088",
    "authors": [
      "D. Nettels",
      "A. Hofer",
      "P. Moroshkin",
      "R. Mueller-Siebert",
      "S. Ulzega",
      "A. Weis"
    ],
    "categories": [
      "physics.atm-clus",
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.94.063001",
    "title": "Discovery of dumbbell-shaped Cs*He_n exciplexes in solid He 4",
    "url": "https://arxiv.org/abs/physics/0407088"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "89471950-6b92-44bb-8117-bc756d17471d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}