Stark width and shift measurements of visible SiIII lines

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.