Absolute rate coefficients for photorecombination and electron-impact 
ionization of magnesiumlike iron ions from measurements at a heavy-ion storage 
ring

Bernhardt, D.; Becker, Arno; Grieser, Manfred; Hahn, M.; Krantz, Claude; Lestinsky, M.; Novotný, O.; Repnow, Roland; Savin, D. W.; Spruck, Kaija; Wolf, Andreas; Müller, A.; Schippers, and S.

doi:10.1103/PhysRevA.90.012702

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Absolute rate coefficients for photorecombination and electron-impact ionization of magnesiumlike iron ions from measurements at a heavy-ion storage ring

MPS-Authors

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Becker, Arno
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30535

Grieser, Manfred
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30715

Krantz, Claude
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30936

Repnow, Roland
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons39262

Spruck, Kaija
Institut für Atom und Molekülphysik, Justus-Liebig-Universität Giessen;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31190

Wolf, Andreas
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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http://link.aps.org/doi/10.1103/PhysRevA.90.012702
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Citation

Bernhardt, D., Becker, A., Grieser, M., Hahn, M., Krantz, C., Lestinsky, M., et al. (2014). Absolute rate coefficients for photorecombination and electron-impact ionization of magnesiumlike iron ions from measurements at a heavy-ion storage ring. Physical Review A, 90(1): 012702. doi:10.1103/PhysRevA.90.012702.

Cite as: https://hdl.handle.net/11858/00-001M-0000-001A-10A0-3

Abstract

Rate coefficients for photorecombination (PR) and cross sections for electron-impact ionization (EII) of Fe¹⁴⁺, forming Fe¹³⁺and Fe¹⁵⁺, respectively, have been measured by employing the electron-ion merged-beams technique at a heavy-ion storage ring. Rate coefficients for PR and EII of Fe¹⁴⁺ ions in a plasma are derived from the experimental measurements. Simple parametrizations of the experimentally derived plasma rate coefficients are provided for use in the modeling of photoionized and collisionally ionized plasmas. In the temperature ranges where Fe¹⁴⁺ is expected to form in such plasmas, the latest theoretical rate coefficients of Altun et al. [Astron. Astrophys. 474, 1051 (2007)] for PR and of Dere [Astron. Astrophys. 466, 771 (2007)] for EII agree with the experimental results to within the experimental uncertainties. Common features in the PR and EII resonance structures are identified and discussed.