Spectra of Very Highly Charged Cu- and Zn-Like Ions

Abstract

The $4s\ensuremath{-}4p$, $4p\ensuremath{-}4d$, and $4d\ensuremath{-}4f$ transitions of ten copperlike and zinclike ions from ${\mathrm{Ba}}^{26+}$ to ${\mathrm{W}}^{45+}$ have been observed by means of a laser-produced plasma and a 2.2-m grazing-incidence spectrograph. The spectra are accompanied by a prominent continuum lying just below the $4p^{2}P_{\frac{1}{2}}\ensuremath{-}4d^{2}D_{\frac{3}{2}}$ transitions in the copperlike ions. The results support the identification of the resonance lines of ${\mathrm{Xe}}^{24+}$ and ${\mathrm{Xe}}^{25+}$ in the Princeton University ST tokamak by Hinnov.