Effects of electron correlation and the Breit interaction on one- and two-electron one-photon transitions in double K hole states of He-like ions (10 ≤ Z ≤ 47)
Ding Xiaobin1, †, Wu Cunqiang1, Cao Mingxin1, Zhang Denghong1, Zhang Mingwu2, Xue Yingli2, Yu Deyang2, Dong Chenzhong1
       

The Breit interaction effect on the transition energies and rates for OEOP and TEOP transitions in He-like ions. (a) The percentage Breit contribution to the OEOP transition energies of 2s2p–1s2s. (b) The percentage Breit contribution to the TEOP transition energies of 2s2p–1s2. (c) The Breit contribution to the OEOP transition rates of 2s2p–1s2s in the length gauge . (d) The Breit contribution to the TEOP transition rates of 2s2p–1s2 in the length gauge.