{
  "id": "1001.2139",
  "version": "v1",
  "published": "2010-01-13T12:29:36.000Z",
  "updated": "2010-01-13T12:29:36.000Z",
  "title": "The FERRUM project: laboratory-measured transition probabilities for Cr II",
  "authors": [
    "J. Gurell",
    "H. Nilsson",
    "L. Engstrom",
    "H. Lundberg",
    "R. Blackwell-Whitehead",
    "K. E. Nielsen",
    "S. Mannervik"
  ],
  "comment": "13 pages. Accepted for publication in A&A",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Aims: We measure transition probabilities for Cr II transitions from the z ^4H_J, z ^2D_J, y ^4F_J, and y ^4G_J levels in the energy range 63000 to 68000 cm^{-1}. Methods: Radiative lifetimes were measured using time-resolved laser-induced fluorescence from a laser-produced plasma. In addition, branching fractions were determined from intensity-calibrated spectra recorded with a UV Fourier transform spectrometer. The branching fractions and radiative lifetimes were combined to yield accurate transition probabilities and oscillator strengths. Results: We present laboratory measured transition probabilities for 145 Cr II lines and radiative lifetimes for 14 Cr II levels. The laboratory-measured transition probabilities are compared to the values from semi-empirical calculations and laboratory measurements in the literature.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-01-13T12:29:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "laboratory-measured transition probabilities",
      "ferrum project",
      "radiative lifetimes",
      "yield accurate transition probabilities",
      "uv fourier transform spectrometer"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/0004-6361/200913672",
      "journal": "Astronomy and Astrophysics",
      "year": 2010,
      "month": "Feb",
      "volume": 511
    },
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 842719,
      "adsabs": "2010A&A...511A..68G"
    }
  }
}