Line formation of high-intensity Heβ-Rydberg dielectronic satellites 1s3lnl′ in dense laser-produced plasmas

F.B. Rosmej, A.Ya. Faenov, T.A. Pikuz, F. Flora, P. Di Lazzaro, T. Letardi, A. Grilli, A. Reale, L. Palladino, G. Tomassetti, A. Scafati, L. Reale

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On the basis of experimental and theoretical investigations it is demonstrated for the first time that in cold dense optically thick laser-produced plasmas, created near the target surface, the capture into the He-like ground state 1s2+ e-→ 1s3lnl′ is negligible for line formation and that observed high-intensity Heβ-Rydberg satellite intensities are correlated with highly populated He-like excited states 1s2l. X-ray emission spectra with simultaneous high spectral (λ/δλ ≈ 10.000) and spatial resolution (δx ≈10 μm) provide a direct verification of the proposed excitation mechanism. Atomic data calculations for all configurations with n = 3-6 have been carried out and were employed in spectral modelling. Taking into account the proposed excitation channels, excellent overall agreement is found. Successful cross-checks with the spectral interval near the Heα-line are demonstrated. The spectral modelling is proposed for sensitive density (electron density, excited state population) and temperature diagnostics near the target surface.
Original languageEnglish
Pages (from-to)-
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number21
Publication statusPublished - 14 Nov 1998
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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