Revised and Extended Analyses of the Pd-Like Ion Spectra Sb VI, Te VII and I VIII

Abstract

The 4d95l–4d95l' transitions in the Pd-like ion spectra Sb VI, Te VII and I VIII have been reinvestigated in the 400 – 900 Å wavelength region using vacuum spark sources. In Sb VI and Te VII, the previous analyses of the 4d95s – 4d95p and 4d95p – 4d95d transitions have been extended by respectively six and twenty-six newly classified lines. An additional forty-four and forty-nine lines have been identified as 4d95d – 4d95f transitions leading to the determination of the 4d95f levels in Sb VI and Te VII. For I VIII, the previously identified 4d95s – 4d95p transitions have been remeasured and seven new lines were added. The 4d95s and 4d95p level energies have been revised. An additional forty-seven lines have been identified as 4d95p – 4d95d transitions leading to the determination of the 4d95d levels. Resonance lines have been remeasured for Te VII and I VIII in the grazing incidence region. The 4d95d 1S0 levels, of crucial interest in the development of X–UV lasers, have been established for the first time in all three spectra studied.