Isotope shift calculations for D lines of stable and short-lived lithium nuclei

The isotope shifts (ISs) for the 2s²S_1/2 to 2p²P_J (J=1/2, 3/2) transitions of the lithium nuclei including the stable and short-lived isotopes are calculated based on the multi-configuration Dirac-Hartree-Fock method and the relativistic configuration interaction approach. The results are in good agreement with the previous theoretical and experimental results within a deviation less than 0.05%. The methods used here could be applied to the IS calculations for other heavier Li-like ions and few-electron systems.