Electron impact broadening of CIV CIV 2s 2S-2p2P0 resonance line

Parameters determining the widths shifts of the CIV lines CIV 2s 2S-2p2P0 are calculated by using the impact approximation and accurate close-coupling theory for the (CIV+e) collision problem. Line widths and shifts are calculated according to the derived parameters. The calculated line widths are compared with the semi-classical calculations and good agreements are found. The discrepancy between the experimental and theoretical Stark widths is almost a factor of 2.