# Correlation, Breit and Quantum Electrodynamics effects on energy level and transition properties of W$^{54+}$ ion

## TL;DR

This study investigates how electron correlation, Breit interaction, and QED effects influence the energy levels and transition properties of the W$^{54+}$ ion using advanced relativistic computational methods.

## Contribution

It provides a detailed analysis of correlation, Breit, and QED effects on W$^{54+}$ ion energy levels using Multi-Configuration Dirac-Fock calculations with a focus on the importance of 3s and 3p orbital correlations.

## Key findings

- Correlation from 3s and 3p orbitals significantly affects energy levels.
- Breit and QED effects are important for accurate transition properties.
- The study enhances understanding of highly charged heavy ion spectra.

## Abstract

The electron correlation effects and Breit interaction as well as Quantum Electro-Dynamics (QED) effects were expected to have important contribution to the energy level and transition properties of heavy highly charged ions. The ground states [Ne]$3s^{2}3p^{6}3d^{2}$ and first excited states [Ne]3s$^{2}3p^{5}3d^{3}$ of W$^{54+}$ ion have been studied by using Multi-Configuration Dirac-Fock method with the implementation of Grasp2K package. A restricted active space was employed to investigate the correlation contribution from different models. The Breit interaction and QED effects were taken into account in the relativistic configuration interaction calculation with the converged wavefunction. It is found that the correlation contribution from 3s and 3p orbital have important contribution to the energy level, transition wavelength and probability of the ground and the first excited state of W$^{54+}$ ion.