Abstract

The effects of the np² configurations on interacting Rydberg series are studied by a simple graphic method that exploits the variation of the quantum defect of energy levels along the ioselectronic sequences of alkaline earths. Regularities and relationships between different isoelectronic sequences can thus be observed and perturbations can be identified; extrapolations and interpolations can then be done to check and to locate energy levels and their assignments and to understand term inversions. Extensive data are available for this purpose for the sequences of Be i and Mg i; Ca, Sr, and Ba will be treated summarily. Interpolated energy values of 3p^{2 1}S₀ for Al ii, S v, and Ar vii were obtained.

© 1974 Optical Society of America

Bound, odd-parity J = 1 spectra of the alkaline earths: Ca, Sr, and Ba

J. A. Armstrong, J. J. Wynne, and P. Esherick
J. Opt. Soc. Am. 69(2) 211-230 (1979)

Effect of continuum configuration interaction on the position of sp⁶ in neutral chlorine and other halogens*

Robert D. Cowan, Leon J. Radziemski, and Victor Kaufman
J. Opt. Soc. Am. 64(11) 1474-1478 (1974)

Multiconfiguration Hartree-Fock study of the interaction between sp⁶ and s²p⁴d in the CI i, Br i, and I i isoelectronic sequences with particular emphasis on the neutral halogens

Jørgen E. Hansen
J. Opt. Soc. Am. 67(6) 754-760 (1977)

Analysis of the spectrum of quadruply ionized aluminum (Al v)

Marie-Christine Artru and Wan-Ü Lydia Brillet
J. Opt. Soc. Am. 64(8) 1063-1071 (1974)

Revised analysis of the 2p⁵3s, 3p, 3d, and 4s configurations of triply ionized aluminum (Al iv)

Victor Kaufman, Marie-Christine Artru, and Wan-U Lydia Brillet
J. Opt. Soc. Am. 64(2) 197-201 (1974)