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The intrinsic time resolution of the beam-foil light source has been utilized in order to single out and to identify intercombination lines in the Mg i, Al i, and Si i isoelectronic sequences for ions with nuclear charge Z = 18–30 (Ar, Ti, Cr, Mn, Fe, Co, Ni, Cu, and Zn). The method is described, and wavelength and lifetime data are presented. For the ions in the Al i and Si i sequences, the level positions of the high–spin term systems (lowest quartet and quintet levels, respectively) have been determined.
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Träbert et al. (1988) studied this question.
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