Testing the reliability of non-LTE spectroscopic models for complex ions

Stephanie Hansen*, G. S J Armstrong, S. Bastiani-Ceccotti, C. Bowen, H. K. Chung, J P Colgan, F. de Dortan, C J Fontes, F. Gilleron, J. R. Marquès, R. Piron, O. Peyrusse, M. Poirier, Yu Ralchenko, A. Sasaki, E. Stambulchik, F. Thais

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Collisional-radiative atomic models are widely used to help diagnose experimental plasma conditions through fitting and interpreting measured spectra. Here we present the results of a code comparison in which a variety of models determined plasma temperatures and densities by finding the best fit to an experimental L-shell Kr spectrum from a well characterized, but not benchmarked, laser plasma. While variations in diagnostic strategies and qualities of fit were significant, the results generally confirmed the typically quoted uncertainties for such diagnostics of ±20% in electron temperature and factors of about two in density. The comparison also highlighted some model features important for spectroscopic diagnostics: fine structure was required to match line positions and relative intensities within each charge state and for density diagnostics based on emission from metastable states; an extensive configuration set was required to fit the wings of satellite features and to reliably diagnose the temperature through the inferred charge state distribution; and the inclusion of self-consistent opacity effects was an important factor in the quality of the fit.

Original languageEnglish
Pages (from-to)523-527
Number of pages5
JournalHigh Energy Density Physics
Issue number3
Publication statusPublished - Sep 2013
Externally publishedYes


  • Atomic kinetics
  • L-shell
  • Plasma diagnostics
  • X-ray spectroscopy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Radiation


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