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Atoms 2015, 3(3), 273-298; doi:10.3390/atoms3030273

Spectra of W VIII and W IX in the EUV Region

1
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow 142190, Russia
2
LERMA, Observatoire de Paris-Meudon, PSL Research University, UMR8112 du CNRS, Sorbonne Universités, UPMC Univ. Paris 06, 92195 Meudon, France
3
Laboratoire Aimé Cotton, CNRS UMR9188, Université Paris-Sud, ENS Cachan, Bâtiment 505, F-91405 Orsay Cedex, France
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Bastiaan J. Braams
Received: 8 April 2015 / Revised: 21 May 2015 / Accepted: 15 June 2015 / Published: 30 June 2015
(This article belongs to the Special Issue Atomic Data for Tungsten)
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Abstract

The results obtained on the W VIII spectrum as well as on the isoelectronic spectra Lu V, Hf VI, Ta VII, and Re IX in the VUV wavelength region are summarized with emphasis on the main trends along the isoelectronic sequence. A total of 187 lines of W VIII in the region of 160–271 Å were accurately measured and identified, 98 levels were found, and transition probabilities calculated. The isoelectronic regularities support the data on W VIII. A list of spectral lines in the region of 170–199 Å, considered as belonging to W IX, is presented. View Full-Text
Keywords: atomic data for tungsten; vacuum ultraviolet; ion spectra; wavelengths; energy levels; transition probabilities; parametric calculations atomic data for tungsten; vacuum ultraviolet; ion spectra; wavelengths; energy levels; transition probabilities; parametric calculations
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ryabtsev, A.; Kononov, E.; Kildiyarova, R.; Tchang-Brillet, W.-Ü.L.; Wyart, J.-F.; Champion, N.; Blaess, C. Spectra of W VIII and W IX in the EUV Region. Atoms 2015, 3, 273-298.

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