{
  "annotation_id": "eafd08e4-8803-4dd7-868e-3abae9293a85",
  "date_created": "2026-03-02T18:01:00.593000Z",
  "date_modified": "2026-03-02T18:01:00.593000Z",
  "file_hash": "de17c9d1dcc70202e10656dd5a8f8465f76649d7b086273933264c90a6ac790d",
  "private": false,
  "record": {
    "abstract": "We carry out a microscopic analysis of the ground and excited states of the\nNa_8 metal cluster within the jellium model. We perform a series of\nconfiguration interaction calculations on a Hartree-Fock basis and construct\neigenstates of the Hamiltonian which carry up to 4-particle 4-hole components.\nBased on the analysis of the dipole transition strengths, we single out those\nstates which can be interpreted as the collective dipole plasmon and its double\nexcitations. These modes are found to possess a high degree of harmonicity,\ndeviations from the harmonic limit remaining, however, of the order of 10%.",
    "arxiv_id": "physics/0509162",
    "authors": [
      "F. Catara",
      "D. Gambacurta",
      "M. Grasso",
      "M. Sambataro"
    ],
    "categories": [
      "physics.atm-clus"
    ],
    "doi": "10.1016/j.physleta.2005.09.044",
    "title": "Configuration interaction study of single and double dipole plasmon   excitations in Na_8",
    "url": "https://arxiv.org/abs/physics/0509162"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "25717220-a68e-43da-bb26-92b2ed4a2917",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}