Revised and extended analyses of I IX and I X

Iodine spectra were photographed in the 104-260-Angstrom region with a triggered spark source. I IX and I X spectra were investigated. In the I IX spectrum earlier results [J. Opt. Sec. Am. 70, 1344 (1979)] were confirmed, except that the 4d(8)(S-1(0))P-2(3/2) level, 1 additional level in the 4d(8)5p configuration, 33 levels belonging to the 4d(8)4f configuration, and 2 levels of the 4p(5)4d(10) configuration were established. Fifty-five additional lines were classified in the I nr spectrum. In the I X spectrum the earlier values of P-3(0) and S-1(0) of the ground configuration 4d(8) and four levels of the odd-parity configurations [J. Opt. Sec. Am. B 14, 1013 (1997)] were rejected. P-3(0) and S-1(0) of the ground-state configuration and five new levels of the odd-parity configurations were established. Sixteen new lines were classified in the I X spectrum. Hartree-Fock calculations with relativistic corrections and least-squares fit parametric calculations were carried out for both spectra for interpretation of the observed energy-level schemes. (C) 1998 Optical Society of America.