Atomic data, and ionization cross-sections by electron impact of tungsten ions, W LXV

Abstract

In the current study, we present a comprehensive investigation of Ne-like tungsten, W LXV. Spectroscopic properties, energies, and transition rates of the configuration list containing 2 s²2p⁶, 2 s²2p⁵3l, 2 s²2p⁴3l², 2s2p⁶3l, and 2s2p⁵3l3l´, l = s, p, and d, and l´ = p and d, have been computed using the multi-configuration Dirac-Hartree-Fock method (MCDHF) and FAC code. Single and double electron excitations are performed to calculate the atomic data precisely. Also, the correlations from the upper atomic states with the principal quantum number, $n=4,5,$ and $6$, are involved in the present calculations. All contributions from the orbitals $s,p,d,f,$ and $g$ have also been correlated to configuration interaction (CI) calculations. In addition to CI and upper-level correlations, the quantum-electrodynamics effects have been considered as well. Moreover, the FAC code has been utilized to evaluate the ionization cross-section by electron impact of the present ion. The electron impact (EI) cross-sections of the ionizing states 2 s²2p⁶ (₁S₀) and 2 s²2p⁵3 s (¹P₁, ³P_0,1,2) to 2 s²2p⁵ (²P_3/2) have been computed, as well as the total cross-sections of previously mentioned states in W LXV for a wide range of collision energies (up to 150 keV). Furthermore, the effect of increasing the principal quantum number (n) and the inclusion of a complete set of configurations on the cross-section values is examined.