dorsal/arxiv
View SchemaDiscovery of dumbbell-shaped Cs*He_n exciplexes in solid He 4
| Authors | D. Nettels, A. Hofer, P. Moroshkin, R. Mueller-Siebert, S. Ulzega, A. Weis |
|---|---|
| Categories | |
| ArXiv ID | physics/0407088 |
| URL | https://arxiv.org/abs/physics/0407088 |
| DOI | 10.1103/PhysRevLett.94.063001 |
Abstract
We have observed several new spectral features in the fluorescence of cesium atoms implanted in the hcp phase of solid helium following laser excitation to the 6$^{2}$P states. Based on calculations of the emission spectra using semiempirical Cs-He pair potentials the newly discovered lines can be assigned to the decay of specific Cs*He$_{n}$ exciplexes: an apple-shaped Cs$(A\Pi _{3/2})$He$_{2}$ and a dumbbell-shaped Cs$(A\Pi_{1/2}) $He$_{n}$ exciplex with a well defined number $n$ of bound helium atoms. While the former has been observed in other enviroments, it was commonly believed that exciplexes with $n>2$ might not exist. The calculations suggest Cs$(A\Pi_{1/2}) $He$_{6}$ to be the most probable candidate for that exciplex, in which the helium atoms are arranged on a ring around the waist of the dumbbell shaped electronic density distribution of the cesium atom.
{
"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
}