Accurate study on the properties of spectral lines for Br-like W³⁹⁺

Abstract

As a primary candidate in tokamak plasmas, the spectroscopic parameters of tungsten ions have been studied extensively over the past decade. In this paper, we perform calculations of excitation energies, lifetimes, wavelengths and transition rates for all levels of the s p 4 4 2 5 , s p d 4 4 4 2 4, and s p 4 4 6 configurations of + W 39 by using the multiconfiguration Dirac-Hartree-Fock (MCDHF) method, and also the relativistic many-body perturbation theory (RMBPT) method. Detailed convergence studies on excitation energy from electron-correlation effects and relativistic effects are presented. It is necessary to include the core-valence correlation from deep lying subshells, e.g. d 3 and p 3 , to produce reliable atomic parameters. Results are compared with available theoretical and experimental work, and the accuracy of the results is confirmed.

Radiative rates for E1, E2, M1, and M2 transitions in F-like ions with55≤Z≤73

“…Comparison of results with existing data are always useful and considerably help in improving the calculations -see for example the recent work of Guo et al [22] on W XL and the references within the paper. However, the problem arises when no prior data exist as noted for some of the Cr-like ions [23].…”