The spectrum of cesium was recorded in the 300–1240-Å region on a 3-m normal-incidence spectrograph and in the 100–300-Å region on a 10.7-m grazing-incidence spectrograph. The earlier analysis of Cs VIII by Kaufman and Sugar [J. Opt. Soc. Am. B <b>4</b>, 1919 (1987)] was confirmed, except for the two levels 5s5d <sup>1</sup>D<sub>2</sub> and 4d<sup>9</sup>5s<sup>2</sup>4f <sup>1</sup>P<sub>1</sub>, and all other, earlier level values were revised. In addition, 12 levels of the 5p4f, the missing levels in the earlier-analyzed 5p<sup>2</sup> <sup>1</sup>S<sub>0</sub> and 5s6s <sup>1</sup>S<sub>0</sub>, and all levels of the 5s4f, 5s5f and 11 of the 12 levels of the 5p5d configurations of the odd-parity configurations have been located. The Hartree–Fock calculations with relativistic corrections and least-squares-fitting calculations were carried out, which helped in the satisfactory interpretation of the spectrum. One hundred ten lines are now classified in this spectrum, of which eighty-six are newly classified lines.
© 1999 Optical Society of America
(300.6210) Spectroscopy : Spectroscopy, atomic
(300.6350) Spectroscopy : Spectroscopy, ionization
(300.6540) Spectroscopy : Spectroscopy, ultraviolet
(300.6550) Spectroscopy : Spectroscopy, visible
R. Gayasov and Y. N. Joshi, "Revised and extended analysis of seven-times-ionized cesium: Cs VIII," J. Opt. Soc. Am. B 16, 1280-1285 (1999)