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      Photoionization of tungsten ions: experiment and theory for W\(^{5+}\)

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          Abstract

          Experimental and theoretical cross sections are reported for single-photon single ionization of W\(^{5+}\) ions. Absolute measurements were conducted employing the photon-ion merged-beams technique. Detailed photon-energy scans were performed at (67\(\pm\)10)~meV resolution in the 20 -- 160 eV range. In contrast to photoionization of tungsten ions in lower charge states, the cross section is dominated by narrow, densely-spaced resonances. Theoretical results were obtained from a Dirac-Coulomb R-matrix approach employing a basis set of 457 levels providing cross sections for photoionization of W\(^{5+}\) ions in the \(4f^{14}5s^2 5p^6 5d \; {^2}{\rm D}_{3/2}\) ground level as well as the \(4f^{14}5s^2 5p^6 5d \; {^2}{\rm D}_{5/2}\) and \(4f^{14}5s^2 5p^6 6s \; {^2}{\rm S}_{1/2}\) metastable excited levels. Considering the complexity of the electronic structure of tungsten ions in low charge states, the agreement between theory and experiment is satisfactory.

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          High Performance Computing in Science and Engineering ' 18

          (2019)
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            Author and article information

            Journal
            29 July 2019
            Article
            1907.12969
            3cf5be11-023e-4a6e-94ff-a7bae2627a3f

            http://arxiv.org/licenses/nonexclusive-distrib/1.0/

            History
            Custom metadata
            15 pages, 5 figures, 2 tables. Accepted for publication in J. Phys. B: At. Mol. Opt. Phys. arXiv admin note: text overlap with arXiv:1703.00892
            physics.atom-ph

            Atomic & Molecular physics
            Atomic & Molecular physics

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