Abstract

Low-inductance triggered-spark spectra of Xe through Eu were observed with the National Bureau of Standards 10.7-m normal- and grazing-incidence vacuum spectrographs. Transition arrays of the Cd i isoelectronic sequence were identified as well as those of the Pd i and Ag i sequences previously reported. Energy levels and fitted radial integrals were derived. Perturbations that are due to configuration crossings arising from the contraction of the 4f shell were revealed in these analyses. The ground configuration in the Cd i sequence changes from 5s² to 5s4f at Sm xv and to 4f² at Eu xvi.

© 1987 Optical Society of America

In i isoelectronic sequence: wavelengths and energy levels for Xe vi through La ix

V. Kaufman and J. Sugar
J. Opt. Soc. Am. B 4(12) 1924-1926 (1987)

Wavelengths, classifications, and ionization energies in the isoelectronic sequences from Yb ii and Yb iii through Bi xv and Bi xvi†

Victor Kaufman and Jack Sugar
J. Opt. Soc. Am. 66(10) 1019-1025 (1976)

Resonance lines in the Ag i and Pd i isoelectronic sequences: Cs ix through Sm xvi and Cs x through Nd xv†

Jack Sugar
J. Opt. Soc. Am. 67(11) 1518-1521 (1977)

Wavelengths and energy levels of I v and I vi

V. Kaufman, J. Sugar, and Y. N. Joshi
J. Opt. Soc. Am. B 5(3) 619-622 (1988)

Ag i-like array 4d¹⁰5s–4d⁹5s5p of I vii through Eu xvii

V. Kaufman and J. Sugar
J. Opt. Soc. Am. B 1(1) 38-40 (1984)