Relativistic Atomic Structure and Spectral Data Calculations for O-Like Tungsten Ion
S. Hamasha
Department of Physics, the Hashemite University, P.O. Box 150459, Zarqa, Jordan
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Accurate atomic data of tungsten is of great importance for plasma research groups including the International Thermonuclear Experimental Reactor because its facing material is made of tungsten (W) which displays complex spectra. There is a wealth of experimental and theoretical atomic data for most tungsten ions but published atomic data of W66+ (O-like W) is scarce. This paper presents a large scale accurate atomic structure and spectral data for this ion in order to fill out this gap. The presented data is calculated by employing two methods: the relativistic multi-configuration interaction approximations and the multireference many-body perturbation theory. Transitions between the excited and ground states of 2l-nl' are considered in the calculations, where n=3, 4, 5 and 6, l is s or p states and l' is the proper corresponding orbital angular momentum of shell n. The correlation effects, the relativistic and QED effects are included in the calculations. Detailed atomic data includes energy levels, weighted oscillator strengths and transition rates for electric-dipole (E1), electric-quadrupole (E2), magnetic-dipole (M1) and magnetic-quadrupole (M2) transitions. The generated data has been used to construct synthetic spectra for E1, E2, M1 and M2 transitions. The comparison of the procured atomic data with the published experimental and theoretical data of W66+ demonstrates good agreement. Findings of this paper are essential for W-plasma diagnostics and fusion research, as well as for other applications of highly ionized tungsten ions.

DOI:10.12693/APhysPolA.138.770
topics: atomic data, plasma spectroscopy, transition probabilities, multipole transitions