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Stark effect is observed in many natural and artificial plasmas and is ofgreat importance for diagnostic purposes. Since this effect alters profiles ofspectral lines, it should be taken into account when assessing chemicalcomposition of radiation sources, including stars. Copper is one of theelements which studies of stellar atmospheres deal with. To this end, UV andvisible Cu lines are used. However, there is a lack of agreement betweenexisting data on their Stark parameters. It is therefore of interest to obtainnew experimental data on these lines and to compare them to previous results.In this work, we have estimated Stark widths and shifts for three blue-greenlines at 5105.54, 5153.24, and 5218.20 A (corresponding transitions are[3d104p] 2P{\deg} - [3d94s2] 2D and [3d104d] 2D - [3d104p] 2P{\deg}) observedin a "long-spark" laser-induced plasma. For the first time, we have accuratelyestimated an impact of hyperfine splitting on the profile shapes of the studiedlines taking also into account the isotope shifts. We have shown that botheffects considerably influence shift and width of Cu I line at 5105.54 A, andshifts of Cu I lines at 5153.24 and 5218.20 A.

The effect of hyperfine splitting on Stark broadening for three blue-green Cu I lines in laser-induced plasma