Laser-producedL-series x-ray spectra

The Ne I resonance transitions were measured with sufficient precision to extend the spectroscopy of the Ne I isoelectronic sequence to $Z=40\mathrm{}$. Ab initio atomic-structure calculations and isoelectronic extrapolations are in agreement with the measured values. Atomic-structure calculations were used to interpret the Na- and Mg-like satellite lines in the $2p-3s$ and $2p-3d$ regions in Se and Zr. The interpretation of the $L$-series satellites may prove important for future plasma diagnostics.