Relativistic all-order many-body calculation of energies, wavelengths, and $M1$ and $E2$ transition rates for the $3d^n$ configurations in tungsten ions

TL;DR

This paper presents a highly accurate all-order relativistic many-body calculation of energy levels and transition rates for tungsten ions with 3d^n configurations, incorporating QED corrections for the first time.

Contribution

It introduces a combined configuration interaction and coupled-cluster approach with QED corrections to accurately predict properties of highly charged tungsten ions.

Findings

Calculated energy levels and transition rates for W$^{51+}$ to W$^{54+}$ ions.

Quantified the effects of QED corrections on the results.

Provided uncertainty estimates for the calculations.

Abstract

Energy levels, wavelengths, magnetic-dipole and electric-quadrupole transition rates between the low-lying states are evaluated for W$^{51+}$ to W$^{54+}$ ions with $3d^n$ (n = 2 to 5) electronic configurations using an approach combining configuration interaction with linearized coupled-cluster single-double method. The QED corrections are directly incorporated into the calculations and their effect is studied in detail. Uncertainties of the calculations are discussed. This first study of such highly charged ions with the present method opens the way for future applications allowing an accurate prediction of properties for a very wide range of highly charged ions aimed at providing precision benchmarks for various applications.