Spectator electron effects on the two-electron one-photon radiative transition process of double K hole state of Xeq+ ion(47 <= q <= 52)

The double electron E1 transition energies, probabilities, and oscillator strengths between the 2s2p(n) and 1s(2)2p(pi-1)(1 <= n <= 6) configurations of Xeq+ (47 <= q <= 52) ions with different spectator electrons have been calculated based on the multi-configuration Dirac-Hartree-Fock method. A reasonable electron correlation model is constructed with the aid of the active space method. The finite mass of nuclear, Breit interaction and QED effects have also been included. The calculated results are in good agreement with the available data. The theoretical spectra of different spectator electrons of the double K hole state have been predicted. The spectator electron effects on the transition spectra have been analyzed in detail. The present results will be helpful for analyzing the high energy X-ray spectrum observed from the interaction between high energy highly charged ions and the surface. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

The study calculated the double electron E1 transition energies, probabilities, and oscillator strengths between different spectator electrons of Xeq+ ions using the multi-configuration Dirac-Hartree-Fock method. The results are in good agreement with available data, and theoretical spectra for different spectator electrons were predicted. Analyzing the effects of spectator electrons on transition spectra will aid in understanding high energy X-ray spectra observed from interactions between high energy highly charged ions and surfaces.