Description
Title: Core Effects on Transition Energies in Ungsten Ions for 3dk Configurations
Abstract: The GRASP2K fully relativistic code based on the variational multiconfiguration Dirac-Hartree-Fock method was used to calculate all energy levels of the 3dk, k = 1, 2,…, 8, 9, configurations for tungsten ions. The results are reported. Valence correlation, in which all 3s, 3p, and 3d orbitals are regarded as valence orbitals, as well as core-valence and core-core effects from the 2s and 2p subshells are taken into account in the calculations. Results are compared to levels deduced from the wavelengths of lines seen in the experimental spectra as well as to other recent theories. It is demonstrated that the core correlation effects significantly lessen disagreement with levels that are directly related to observed wavelengths, but they may differ significantly from NIST levels, where an unidentified shift of the levels could not be predicted from experimental wavelengths. Levels were in good agreement with relativistic many-body perturbation levels for low values of k, but for 2 k 8 the present results were more in line with observation.
Keywords: core correlation effects; energy levels; multiconfiguration Dirac-Hartree-Fock; tungsten ions
Paper Quality: SCOPUS / Web of Science Level Research Paper
Subject: Physics
Subject Category: Atomic and Molecular Physics, and Optics
Writer Experience: 20+ Years
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