Stark broadening of C iv and N v lines in the vacuum-uv spectral range

Spectral line shapes of 3p-4d, 3d-4f, 4d-5f, and 4f-5g transitions in the lithiumlike ions C i v and N v have been measured in a gas-liner pinch discharge at a density of 7.7×${10}^{23}$ ${\mathrm{m}}^{\mathrm{-}3}$. The full widths at half maximum are larger than theoretical values obtained by the impact approximation by factors between 3 and 4 and smaller than theoretical full widths at half maximum calculated in the quasistatic, linear Stark effect approximation by factors between 1.2 and 3.