The 5<i>s</i><sup>2</sup> 5<i>p</i><sup>4</sup>–5<i>s</i>5<i>p</i><sup>5</sup> transitions of Cs IV, Ba v, and La VI were observed with a sliding spark discharge and a 10.7-m normal-incidence spectrograph. The region of observation was 539–1282 Å. The energy parameters derived from least-squares fits to the experimental levels are compared with Hartree–Fock (HF) calculations. The fitted/HF ratios for the 5<i>s</i><sup>2</sup>5<i>p</i><sup>4</sup> configurations of the ions Te I–La VI are compared with the fitted/HF ratios for the 4<i>s</i><sup>2</sup>4<i>p</i><sup>4</sup> configurations of the ions Se I–Mo Ix.
© 1983 Optical Society of America
Joseph Reader, "5s2 5p4–5s5p5 transitions in Cs Iv, Ba v, and La VI," J. Opt. Soc. Am. 73, 349-352 (1983)