Laser-Produced Spectra and QED Effects for Fe-, Co-, Cu-, and Zn-like Ions of Au, Pb, Bi, Th, and U

Abstract

Spectra of very highly charged ions of Au, Pb, Bi, Th, and U have been observed in laser-produced plasmas generated by the OMEGA laser. Line identifications in the region 9-110 \AA{} were made for ions in the Fe, Co, Cu, and Zn isoelectronic sequences. Comparison of the measured wavelengths of the Cu-like ions with values calculated with and without QED corrections shows that the inclusion of QED corrections greatly improves the accuracy of the calculated $4s\ensuremath{-}4p$ wavelengths. However, significant differences between the observed and calculated values remain.