A fully reIativistic multiconfiguration Dirac-Fock method with Breit and QED corrections is used to caIcuIate the magnetic dipoIe 3p⁶3d²D_5/2-²D_3/2（Z=22~42）transition energy level separations,transition probabilities and oscillator strengths for the K-like ions. In calculation,significant core polarization effects,Breit and OED corrections are considered. The results are in agreement with recent experiments. A substantial part discrepancy disappears in the ²D_5/2-²D_3/2 separations when core excitation channels are taken into account. There are no transition probability and oscillator strength resuIts in the isoelectronic seguence until now.

A fully relativistic multiconfiguration Dirac-Fock method with Breit and QED corrections is used to calculate the spin-forbidden 3s^{2 1}S₀-3s3p³P₁(Z=14~103) transition energy level separations and transition probabilities for the Mg-like ions. In the calculation, significant Breit and QED corrections are considered and the results are in agreement with recent experimental data and other theoretical values. The results show that the spin-forbidden transition probabilities are in correspondence with those of E1 transitions and shouldn't be ignored in the laser plasma with high temperature created in ICF and MCF fusion.