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Astrophysical line diagnosis requires non-linear dynamical atomic modeling

MPS-Authors
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Oreshkina,  Natalia S.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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Cavaletto,  Stefano M.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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Keitel,  Christoph H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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Harman,  Zoltán
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

Fulltext (public)

1407.0937.pdf
(Preprint), 502KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Oreshkina, N. S., Cavaletto, S. M., Keitel, C. H., & Harman, Z. (2014). Astrophysical line diagnosis requires non-linear dynamical atomic modeling. Physical Review Letters, 113(14): 143001. doi:10.1103/PhysRevLett.113.143001.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0023-EC6C-A
Abstract
Line intensities and oscillator strengths for the controversial 3C and 3D astrophysically relevant lines in neonlike Fe16+ ions are calculated. We show that, for strong x-ray sources, the modeling of the spectral lines by a peak with an area proportional to the oscillator strength is not sufficient and non-linear dynamical effects have to be taken into account. Furthermore, a large-scale configuration-interaction calculation of oscillator strengths is performed with the inclusion of higher-order electron-correlation effects. The dynamical effects give a possible resolution of discrepancies of theory and experiment found by recent measurements, which motivates the use of light-matter interaction models also valid for strong light fields in the analysis and interpretation of astrophysical and laboratory spectra.