A set of experimental Stark width and shift parameters of visible doubly io
nized silicon spectral lines is reported in this paper. Measurements have b
een made on a pulsed plasma generated in a linear discharge lamp filled wit
h a mixture of silane and helium. Electron density and temperature in this
plasma range from 0.2 to 0.9 x 10(23) m(-3) and from 17 500 to 21 000 K res
pectively. Electron density has been simultaneously determined by two-wavel
ength interferometry and from Stark broadening of He I 501.6 nm, He I 728.1
nm and H-alpha lines. Temperature has been simultaneously determined from
Boltzmann-plot of He I lines, from absolute emission of He I lines, from Bo
ltzmann-plot of Sill lines and from Si III/Si II intensities ratio. Depende
ncies of measured Stark parameters with electron density and temperature ha
ve been investigated and the final results have been compared with most of
the previous experimental data as well as with some theoretical models.