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.
|Journal||Journal of Physics B: Atomic, Molecular and Optical Physics|
|Publication status||Published - 14 Nov 1998|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
Rosmej, F. B., Faenov, A. Y., Pikuz, T. A., Flora, F., Di Lazzaro, P., Letardi, T., ... Reale, L. (1998). Line formation of high-intensity Heβ-Rydberg dielectronic satellites 1s3lnl′ in dense laser-produced plasmas. Journal of Physics B: Atomic, Molecular and Optical Physics, 31(21), -. https://doi.org/10.1088/0953-4075/31/21/005