Electron correlation and Breit interaction effects on the one- and two-electron one-photon transitions in double K hole states of He-like ions($10\!\leq\!Z\!\leq\!47$)

The x-ray energies and transition rates of single and double electron radiative transitions from double K hole state $2s2p$ to $1s2s$ and $1s^{2}$ configuration of 11 He-like ions ($10\!\leq\!Z\!\leq\!47$) are evaluated using fully relativistic multi-configuration Dirac-Fock method. An appropriate electron correlation model was constructed with the aid of active space method, with which the electron correlation effects can be studies efficiently. The contributions from electron correlation, Breit interaction to the transition properties have been analyzed in detail. It is found that the two-electron one-photon (TEOP) transition is correlation sensitive. The Breit interaction and electron correlation both have significant contribution to the radiative transition properties of double K hole state of He-like ions. A good agreement between the present calculation and the previous work was achieved. The calculated data will be helpful for the future investigations on double K hole decay process of He-like ions.