{
  "annotation_id": "e47f0117-dff6-4a24-8d19-bc0056133321",
  "date_created": "2026-03-02T18:01:18.443000Z",
  "date_modified": "2026-03-02T18:01:18.443000Z",
  "file_hash": "59130599aa853e5c83b69112e2c48cd3320ac6e23bdfb00969d95e63609189ec",
  "private": false,
  "record": {
    "abstract": "Balmer spectra are investigated which are obtained from hydrogen droplets\nirradiated by ultra-short intense laser pulses. A unified quantum statistical\ndescription of bremsstrahlung, the Stark broadening and the van der Waals\nprofile of hydrogen spectral lines is used, which allows to include\nmany-particle effects. Analyzing the line profiles, a low ionization degree of\na dense plasma is inferred, where the main contribution to the spectral line\nshape originates from the interaction with the neutral components. Effective\ntemperatures and densities of the radiating microplasma are deduced. A\ndynamical description is given within plasma hydrodynamics, explaining the\nformation of excited atomic states in the expanding system and the occurrence\nof the observed Balmer lines only below a critical density.",
    "arxiv_id": "physics/0703177",
    "authors": [
      "Carsten Fortmann",
      "Tilo D\u00f6ppner",
      "Tim Laarmann",
      "Andreas Przystawik",
      "Thomas Raitza",
      "Gerd R\u00f6pke",
      "Josef Tiggesb\u00e4umker",
      "Nguyen Xuan Truong"
    ],
    "categories": [
      "physics.plasm-ph",
      "physics.atm-clus"
    ],
    "title": "On the occurrence of Balmer spectra in expanding microplasmas from laser   irradiated liquid hydrogen",
    "url": "https://arxiv.org/abs/physics/0703177"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1c890f78-7de6-459a-aae3-4c2679e38e55",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}