Abstract

Theoretical calculation of energy levels and spectra ab initio are described for transitions of the type pmpm−1l, especially 3pm–3pm−13d transitions in the Ar i and Cl i isoelectronic sequences. Strong changes of wavefunction composition occur in going from neutral atoms to ions as a result of collapse of the 3d wavefunction; for m = 2 and 6 these take the form of coupling changes, and for m = 3–5 they take the form of changes of parentage composition. Abnormally low Ti v 3p6–3p54d intensities are explained as an interference effect in evaluation of the dipole radial integral.

© 1968 Optical Society of America

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J. Opt. Soc. Am. 58(6) 808-818 (1968)

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