Photoionization of tungsten ions: experiment and theory for W5+

Müller, A.; Schippers, S.; Hellhund, J.; Kilcoyne, A. L. D.; Phaneuf, R. A.; McLaughlin, B. M.

doi:10.1088/1361-6455/ab39c8

Title: Photoionization of tungsten ions: experiment and theory for W⁵⁺

Journal Article · Thu Sep 12 00:00:00 EDT 2019 · Journal of Physics. B, Atomic, Molecular and Optical Physics

DOI:https://doi.org/10.1088/1361-6455/ab39c8· OSTI ID:1561372

;

; Hellhund, J.;

; Phaneuf, R. A.;

Experimental and theoretical cross sections are reported for single-photon single ionization of W⁵⁺ ions. Absolute measurements were conducted employing the photon-ion merged-beams technique. Detailed photon-energy scans were performed at (67 ± 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 W⁵⁺ ions in the 4ƒ¹⁴5s²5p⁶6s ²D_3/2 ground level as well as the 4ƒ¹⁴5s²5p⁶5d ²D_5/2 and 4ƒ¹⁴5s²5p⁶6s ²S_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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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: AC02-05CH11231; FG02-03ER15424

OSTI ID:: 1561372

Alternate ID(s):: OSTI ID: 1580945

Journal Information:: Journal of Physics. B, Atomic, Molecular and Optical Physics, Journal Name: Journal of Physics. B, Atomic, Molecular and Optical Physics Vol. 52 Journal Issue: 19; ISSN 0953-4075

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 5 works

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References (26)

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