Line broadening in the neutral and ionized mercury spectra

► We present Stark parameters for one Hg I, 19 Hg II, 6 Hg III and 4 Hg IV lines. ► The parameters are measured in plasma of pulsed helium discharge. ► The plasma el. density was ∼1.0 × 1023 m−3 and el. temperature ∼19,500 K. ► The shape of Hg II 398.4 nm line was discussed. ► Stark broadening is found to be a main broadening mechanism in Hg I-V spectra.