Abstract
The Lyman-\ensuremath{\alpha} and adjacent dielectronic satellite lines have been observed with high spatial and spectral resolution from laser-irradiated aluminum tracer dot targets at 1.06, 0.53, and 0.27 \ensuremath{\mu}m wavelength. The $1s2p ^{3}P\ensuremath{-}{2p}^{2}^{3}P$ to $1s2s ^{3}S\ensuremath{-}2s2p ^{3}P$ line-intensity ratio strongly increases for visible and uv laser wavelengths, indicating that time-integrated spectroscopic emissions from satellite lines probe higher electron densities under these laser-irradiation conditions. Numerical simulations including ground-state, singly excited and doubly excited levels of configurations $2{l}_{a}2{l}_{b}$ and $2{l}_{a}3{l}_{b}$ in a collisional-radiative equilibrium model including photon-pumping effects are in good agreement with experimental data. Plasma electric field broadening of satellite lines is also exhibited at high electron densities.
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