Ne-like Ca xi–Mn xvi 2p53l-2p54l transition arrays and energy levels

Spectra from laser-produced plasmas of Ca, Sc, Ti, V, Cr, and Mn have been recorded in the grazing-incidence region, and the transition arrays 3s-4p, 3p-4s, 3p-4d, and 3d-4f of the neonlike ions have been identified. The measured wavelengths together with the previously observed 3-3 transitions have been used for deriving energy levels of the 2$s^2$2$p^5$3l and 2$s^2$2$p^5$4l configurations. The term structure has been analyzed by means of ab initio and parametric calculations and isoelectronic relations. Coupling conditions have been studied and eigenvectors have been derived. Significant perturbations caused by the 2s2$p^6$nl configurations have been investigated.