Abstract

Spectra of Lu obtained with a sliding spark discharge at peak currents of 50–500 A were recorded with a 10.7 m normal incidence spectrograph in the range of 500–2100 Å. Intercomparison of spectra revealed a distinct separation of Lu iii, iv, and v, the first two of which have already been anlayzed. The present work contains an interpretation of Lu v in which 419 lines are classified as transitions among 136 energy levels of the 4f13, 4f125d, 4f126s, and 4f126p configurations. Calculated energy levels and eigenvectors, obtained with fitted values for the radial integrals, are given.

© 1978 Optical Society of America

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