Abstract

The spectrum of triply ionized aluminum (Al iv) was observed between 700 and 2200 Å. About 60 new lines have been identified as transitions between the 2p 53s, 3p, 3d, and 4s configurations. The ground-state combinations have been remeasured (124–161 Å). Energies and designations are given for all levels of these configurations, and several changes and additions to the previous analysis have been made. Results of calculations of these configurations are included to support the level identifications. An isoelectronic comparison is discussed.

© 1974 Optical Society of America

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