Abstract

The Al v spectrum has been observed between 90 and 3000 Å. The classification of 140 new lines above 500 Å has led to the determination of the 2s 22p 43s, 3p, 3d, and 4s configurations. Intercombination lines are observed between terms of different multiplicity or different parentage. Below 300 Å, new measurements are given for the ground-term transitions to even levels and three new transitions from the 2s 2p6 2S1/2 level are observed. Parametric calculations of these configurations support the level assignments. Graphs are given for comparision of the 2s 22p 43d configuration along the F i isoelectronic sequence up to Cl ix. Some changes of previous identifications are suggested in S viii and Cl ix.

© 1974 Optical Society of America

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