Stark broadening of triply ionized oxygen lines: The temperature dependence

The Stark widths of the 3s ${}_{}{}^2{}_{}{}^{}$S-3p ${}_{}{}^2{}_{}{}^{}$ ${\mathit{P}}^{\mathit{o}}$ and 3p ${}_{}{}^2{}_{}{}^{}$ ${\mathit{P}}^{\mathit{o}\mathrm{-}}$3d ${}_{}{}^2{}_{}{}^{}$D transitions have been calculated and measured in the plasma of a pulsed arc. Electron densities in the range (2.1–6.4)×${10}^{17}$ ${\mathrm{cm}}^{\mathrm{-}3}$ were determined from the width of the He i i ${\mathit{P}}_{\mathrm{\alpha }}$ line while electron temperatures between 50 800 and 131 800 K are measured from the Boltzmann plot of O i v line intensities. Our experimental O i v Stark width agrees well with another experiment and with our semiclassical theoretical results in the whole temperature range.