  We report measurements of the Stark shifts and Stark widths of sodium
spectral lines corresponding to nS-3P and mD-3P transitions. Measurements have
been made on AC driven high pressure NaHg and NaCd discharges. Electron density
has been determined from the measurements of the Stark shift of sodium 7S-3P
spectral line. The electron temperature and the density of neutral particles
have been determined analyzing the shape of the measured sodium atomic lines,
comparing the calculated and the observed line profiles. Electron density and
temperature range from 6x1021 to 1x1022 m-3, and from 3800 to 4100 K
respectively. Dependeces of measured Stark shifts and Stark widths on electron
density and temperature hace been investigated. The final results have been
compared with available theoretical and experimental data.
