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An unexpectedly low oscillator strength as the origin of the Fe xvii emission problem

Author

Listed:
  • S. Bernitt

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany)

  • G. V. Brown

    (Lawrence Livermore National Laboratory)

  • J. K. Rudolph

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
    Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany)

  • R. Steinbrügge

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany)

  • A. Graf

    (Lawrence Livermore National Laboratory)

  • M. Leutenegger

    (NASA/Goddard Space Flight Center
    University of Maryland)

  • S. W. Epp

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
    Max Planck Advanced Study Group, Center for Free Electron Laser Science, 22607 Hamburg, Germany)

  • S. Eberle

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany)

  • K. Kubiček

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
    Present addresses: Max-Planck-Institut für biophysikalische Chemie, 37077 Göttingen, Germany (K.K.); RIKEN, Wako, Saitama 351-0198, Japan (V.M.); Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany (J.U.).)

  • V. Mäckel

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
    Present addresses: Max-Planck-Institut für biophysikalische Chemie, 37077 Göttingen, Germany (K.K.); RIKEN, Wako, Saitama 351-0198, Japan (V.M.); Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany (J.U.).)

  • M. C. Simon

    (TRIUMF, Vancouver, British Columbia V6T 2A3, Canada)

  • E. Träbert

    (Lawrence Livermore National Laboratory)

  • E. W. Magee

    (Lawrence Livermore National Laboratory)

  • C. Beilmann

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany)

  • N. Hell

    (Lawrence Livermore National Laboratory
    Dr.-Karl-Remeis-Sternwarte Bamberg and Erlangen Centre for Astroparticle Physics, Universität Erlangen-Nürnberg, 96049 Bamberg, Germany)

  • S. Schippers

    (Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany)

  • A. Müller

    (Institut für Atom- und Molekülphysik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany)

  • S. M. Kahn

    (Kavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory)

  • A. Surzhykov

    (Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, 69120 Heidelberg, Germany
    GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany)

  • Z. Harman

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
    ExtreMe Matter Institute (EMMI), 64291 Darmstadt, Germany)

  • C. H. Keitel

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany)

  • J. Clementson

    (Lawrence Livermore National Laboratory)

  • F. S. Porter

    (NASA/Goddard Space Flight Center)

  • W. Schlotter

    (Linac Coherent Light Source, SLAC National Accelerator Laboratory)

  • J. J. Turner

    (Linac Coherent Light Source, SLAC National Accelerator Laboratory)

  • J. Ullrich

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
    Present addresses: Max-Planck-Institut für biophysikalische Chemie, 37077 Göttingen, Germany (K.K.); RIKEN, Wako, Saitama 351-0198, Japan (V.M.); Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany (J.U.).)

  • P. Beiersdorfer

    (Lawrence Livermore National Laboratory)

  • J. R. Crespo López-Urrutia

    (Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany)

Abstract

Fluorescence of iron ions induced by an X-ray laser allows the relative oscillator strength for Fe xvii emission to be determined; it is found to differ by 3.6σ from the best quantum mechanical calculations, suggesting that the poor agreement between prediction and observations of the brightest Fe xvii line is rooted in the quality of the underlying atomic wavefunctions used in the models.

Suggested Citation

  • S. Bernitt & G. V. Brown & J. K. Rudolph & R. Steinbrügge & A. Graf & M. Leutenegger & S. W. Epp & S. Eberle & K. Kubiček & V. Mäckel & M. C. Simon & E. Träbert & E. W. Magee & C. Beilmann & N. Hell &, 2012. "An unexpectedly low oscillator strength as the origin of the Fe xvii emission problem," Nature, Nature, vol. 492(7428), pages 225-228, December.
    • Handle: RePEc:nat:nature:v:492:y:2012:i:7428:d:10.1038_nature11627
    DOI: 10.1038/nature11627
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