Electron-ion recombination of Fe12+ forming Fe11+ : laboratory measurements and theoretical calculations

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Hahn, M. and Badnell, N. R. and Grieser, M. and Krantz, C. and Lestinsky, M. and Müller, A. and Novotný, O. and Repnow, R. and Schippers, S. and Wolf, A. (2014) Electron-ion recombination of Fe12+ forming Fe11+ : laboratory measurements and theoretical calculations. Astrophysical Journal, 788 (1). ISSN 1538-4357 (https://doi.org/10.1088/0004-637X/788/1/46)

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Abstract

We have measured dielectronic recombination (DR) for Fe12 + forming Fe11 + using the heavy ion storage ring TSR located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Using our results, we have calculated a plasma rate coefficient from these data that can be used for modeling astrophysical and laboratory plasmas. For the low temperatures characteristic of photoionized plasmas, the experimentally derived rate coefficient is orders of magnitude larger than the previously recommended atomic data. The existing atomic data were also about 40% smaller than our measurements at temperatures relevant for collisionally ionized plasmas. Recent state-of-the-art theory has difficulty reproducing the detailed energy dependence of the DR spectrum. However, for the Maxwellian plasma rate coefficient, recent theoretical results agree with our measurements to within about 30% for both photoionized and collisionally ionized plasmas.

ORCID iDs

Hahn, M., Badnell, N. R. ORCID logoORCID: https://orcid.org/0000-0001-7418-7996, Grieser, M., Krantz, C., Lestinsky, M., Müller, A., Novotný, O., Repnow, R., Schippers, S. and Wolf, A.;
  • Item type:Article
    ID code:54155
    Dates:
    Date
    Event
    June 2014
    Published
    20 May 2014
    Published Online
    18 April 2014
    Accepted
    Subjects:Science > Astronomy
    Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:03 Sep 2015 15:57
    Last modified:11 Nov 2024 11:10
    URI:https://strathprints.strath.ac.uk/id/eprint/54155
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