Ab initio MCDHF/RCI calculations of mass- and field shifts isotopes parameters of the 1s21S0−1s2p1Po1 and 1s21S0−1s2p3Po0,1,2 transitions in He-like ions for the sequence 2 ≤Z≤ 83

Based on the multiconfiguration Dirac–Hartree–Fock method, the field shift and mass shift parameters of the 1𝑠2 1𝑆0 −1𝑠2𝑝 1𝑃𝑜 1 and 1𝑠2 1𝑆0 −1𝑠2𝑝 3𝑃𝑜 0,1,2 transitions in He-like ions for the sequence 2 <Z< 83 are calculated with high precision. The total value of the isotope shift is determined by the sum of the mass- and field-shifts. With the inclusion of the Breit interaction and the leading QED corrections, we find that the mass shift parameters of these transitions do not change monotonously along the isoelectronic sequence in the high-Z range due to the relativistic nuclear recoil effects. In addition, the field shifts and mass shifts of these four transitions are estimated and compared along the isoelectronic sequence.