Isotope shift of the 2s ²S_1/2 \rightarrow 2p ²P_1/2,3/2 transitions of Li-like Ca ions

The mass-and field-shift parameters of the two 2s ²S_1/2 \rightarrow 2p ²P_1/2,3/2 transitions in the Li-like Ca ions are calculated by using multi-configuration Dirac-Hartree-Fock (MCDHF) and the relativistic configuration interaction (RCI) methods with the inclusion of the transverse photon (Breit) interaction, vacuum polarization and self-energy corrections. In addition, the mass shift and field shift of these two transitions are calculated, where the field shift is calculated by using the evaluated value \delta\langle r^2\rangle obtained by Atomic Data and Nuclear Data Tables 9969 (2013). It is found that the mass shift of Li-like Ca ions is greater than the field shift.