Abstract
We present an accurate QED calculation of the interelectron interaction corrections to the energy of the (1s2p)1P1 and (1s2p)3P1 two-electron configurations for ions with nuclear charge 10⩽Z⩽92. When the fully relativistic treatment based on j–j coupling scheme is employed, the corresponding energy levels become quasidegenerate in the region Z⩽40. To evaluate the energies of these configurations within the framework of QED we utilize the line profile approach. The numerical results we have obtained are compared with available experimental data and with different calculations.
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