Detailed Analysis of Configuration Interaction and Calculation of Radiative Transition Rates in Seven Times Ionized Tungsten (W VIII)

Deprince, J.; Quinet, Pascal

doi:10.3390/atoms3030299

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…Until now W VIII spectra are observed at 175 -275 Å in MT-IM tokamak without identification due to a poor spectral resolution of 5 Å at [22]. The W VIII spectra are also studied in EBIT device and calculation [23][24][25]. In LHD, W VIII lines are clearly found at 155 -295 Å in Figs.…”

Section: Resultsmentioning

confidence: 99%

Observation of Tungsten Line Emissions in Wavelength Range of 10 - 500 Å in Large Helical Device

Liu

Morita

Oishi

et al. 2018

Plasma and Fusion Research

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Tungsten spectra have been observed in Large Helical Device (LHD) by injecting a coaxial tungsten pellet to identify the emission lines in extreme ultraviolet (EUV) range of 10 -500 Å. The spectra of line emissions from tungsten ions have been measured in neutral-beam-heated discharges using two EUV spectrometers of EUV_Short and EUV_Long working in wavelength ranges of 10 -130 Å and 50 -500 Å, respectively. As a result, a lot of tungsten lines from low-ionized ions of W 4+ , W 6+ and W 7+ are observed for the first time in the toroidal device in addition to tungsten lines from highly ionized ions of W 41+ -W 45+ . Measured line emissions are carefully identified based on the NIST database and the determined wavelengths show a good agreement with the NIST database. The result is summarized in table with information on blended lines obtained from the radial profile measurement.

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Section: Resultsmentioning

confidence: 99%

Observation of Tungsten Line Emissions in Wavelength Range of 10 - 500 Å in Large Helical Device

Liu

Morita

Oishi

et al. 2018

Plasma and Fusion Research

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“…In this context, the new sets of atomic data obtained in our work for the first ionization stages of tungsten (W I, W II, and W III) [104][105][106][107] will be extremely useful for future fusion plasma analyses. As an extension of these studies, radiative decay rates have been obtained recently for allowed (E1) and forbidden (M1, E2) transitions in Lu-like (W IV), Yb-like (W V), Tm-like (W VI), and Ho-like (W VIII) tungsten [108][109][110][111]. The latter investigations were carried out with the HFR + CPOL + CPEN method in which the radial energy parameters were optimized semi-empirically using the most recent experimental energy levels available (ref.…”

Section: Sixth Row Elementsmentioning

confidence: 95%

Overview of recent advances performed in the study of atomic structures and radiative processes for the lowest ionization stages of heavy elements

Quinet

2017

Can. J. Phys.

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During the past 20 years, part of our work has been focused on the study of the atomic structure and the determination of radiative parameters in neutral and slightly ionized heavy atoms (Z ≥ 37). These elements attracted little previous interest because of the complexity of their electronic structures, the poor knowledge of their spectra, and the difficulty to perform experimental measurements. They present, however, great interest in the development of other scientific areas, such as astrophysics and plasma physics. In this paper, we give an overview of the recent progress performed by the group of Atomic Physics and Astrophysics at Mons University (Belgium) in the theoretical modelling and the experimental analysis of such heavy elements. We also discuss some applications of the atomic data obtained in our work for the interpretation of the spectra observed from astrophysical and laboratory plasmas.Key words: atomic data, oscillator strengths, radiative transition probabilities, heavy elements.Résumé : Durant les 20 dernières années, une partie de notre travail a été focalisée sur l'étude de la structure atomique et la détermination des paramètres radiatifs dans les atomes lourds neutres et faiblement ionisés (Z ≥ 37). Ces éléments avaient attiré peu d'intérêt auparavant à cause de la complexité de leurs structures électroniques, du manque de connaissance de leurs spectres et de la difficulté à réaliser des mesures expérimentales. Ils présentent cependant un grand intérêt pour le développe-ment d'autres domaines scientifiques comme l'astrophysique et la physique des plasmas. Dans cet article, nous présentons un aperçu général des progrès récents réalisés par le groupe de Physique Atomique et Astrophysique de l'Université de Mons (Belgique) dans la modélisation et l'analyse expérimentale de tels éléments lourds. Nous discutons également quelques applications des données atomiques obtenues dans notre travail pour l'interprétation des spectres observés à partir de plasmas astrophysiques et de laboratoire.Mots-clés : ions lourds, données atomiques, temps de vie radiatifs, forces d'oscillateur, probabilités de transition.

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Theoretical level energies, radiative lifetimes and transitions in W IX

Kozioł

Rzadkiewicz

2021

Atomic Data and Nuclear Data Tables

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Detailed Analysis of Configuration Interaction and Calculation of Radiative Transition Rates in Seven Times Ionized Tungsten (W VIII)

Cited by 7 publications

References 20 publications

Observation of Tungsten Line Emissions in Wavelength Range of 10 - 500 Å in Large Helical Device

Observation of Tungsten Line Emissions in Wavelength Range of 10 - 500 Å in Large Helical Device

Overview of recent advances performed in the study of atomic structures and radiative processes for the lowest ionization stages of heavy elements

Theoretical level energies, radiative lifetimes and transitions in W IX

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