Eur. Phys. J. D (2017) 71: 73
https://doi.org/10.1140/epjd/e2017-70829-y

Regular Article

Correlation, Breit and Quantum Electrodynamics effects on energy level and transition properties of W⁵⁴⁺ ion^*

¹ Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, P.R. China
² Department of Physics, Sophia University, 102-8554 Tokyo, Japan
³ National Institute for Fusion Science, Toki, 509-5292 Gifu, Japan

^a e-mail: dingxb@nwnu.edu.cn

Received: 31 December 2016
Published online: 23 March 2017

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]3s²3p⁶3d² and first excited states [Ne]3s²3p⁵3d³ of W⁵⁴⁺ ion have been studied by using Multi-Configuration Dirac-Fock method with the implementation of Grasp2K package. A restricted active space method 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 W⁵⁴⁺ ion.