Dependence of the Stark broadening on the emitter charge for the3s−3ptransitions of Li-like ions

Abstract

The Stark widths of the $3s-3p$ transitions for the Li-like ions CIV, NV, and OVI were measured for the plasma parameters $n_e=1.8\mathrm{}\times {10}^{24}$ ${\mathrm{m}}^{-3\mathrm{}}$ and $k{T}_e=12.5\mathrm{}$ eV. Within the error limits, the measurements clearly show a $Z^{-1\mathrm{}}$ dependence of the Stark width on the emitter ionization stage $Z$ ($Z=4\mathrm{}$ for CIV), whereas calculations within the electron-impact approximation yield Stark widths more nearly proportional to $Z^{-2\mathrm{}}$.