Comparative semi-empirical andab initioatomic structure calculations in Yb-like tungsten W4 +

In this paper, we report on extensive calculations of radiative data in Yb-like tungsten ion using several independent atomic structure methods, i.e. the relativistic Hartree-Fock approach, the flexible atomic code and the multiconfiguration Dirac-Fock method.This multi-platform approach allowed us to check the consistency of our results.Advantages and shortcomings of semi-empirical and ab initio methods for atomic structure calculations in such a complex heavy ion are also discussed in detail.A new set of transition probabilities and oscillator strengths is reported for electric dipole lines together with magnetic dipole and electric quadrupole lines in this ion of interest for fusion plasma diagnostics.