Penetrating standard line broadening impact theory for hydrogen-like ions

Poquérusse, A.; Alexiou, S.

doi:10.1016/j.jqsrt.2005.05.039

Cited by 11 publications

(8 citation statements)

References 2 publications

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“…This effect softens the interaction and makes perturbative treatments valid for a larger part of the phase space, resulting in a much reduced strong collision term and relatively small (practically no for the present work) difference in the CONVPST calculations with and without the strong collision term. As a result for hydrogen and H-like lines, this effect can be accounted for analytically and this has been done for the dipole part of the interaction [2,9,10]. It is therefore probably not a coincidence that agreement between CONVPST and DWE is very good for all lines in the series.…”

Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou¹,

Stambulchik

Gomez

et al. 2018

Preprint

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For a given set of plasma parameters, along a single series (Lyman, Balmer etc) the lines with higher principal quantum number(n) lines get progressively wider, closer to each other, and start merging for a certain critical n. In the present work four different codes(with further options) are used to calculate the entire Balmer series for moderate and high electron densities. Particular attention is paid to the relevant physics, such as the cutoff criteria, strong and penetrating electron collisions.

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Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou¹,

Stambulchik

Gomez

et al. 2018

Preprint

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“…In addition, for each ST and PST [9,10] calculations, runs were contributed with or without account of strong collisions. In CONVST, strong are collisions with impact parameters that are either smaller than n 2 a 0 or violate unitarity in a perturbative treatment for a given velocity.…”

Section: The Codesmentioning

confidence: 99%

“…This effect softens the interaction and makes perturbative treatments valid for a larger part of the phase space, resulting in a much reduced strong collision term and relatively small difference (practically zero for the present work) in the CONVPST calculations with and without the strong collision term. As a result for hydrogen and H-like lines, this effect can be accounted for analytically and this has been done for the dipole part of the interaction [2,9,10]. It is, therefore, probably not a coincidence that agreement between CONVPST and DWE is very good for all lines in the series.…”

Section: The Codesmentioning

confidence: 99%

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Alexiou

Stambulchik

Gomez

et al. 2018

Atoms

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Abstract:For a given set of plasma parameters, along a single series (Lyman, Balmer, etc.) the lines with higher principal quantum number (n) lines get progressively wider, closer to each other, and start merging for a certain critical n. In the present work, four different codes (with further options) are used to calculate the entire Balmer series for moderate and high electron densities. Particular attention is paid to the relevant physics, such as the cutoff criteria, strong and penetrating electron collisions.

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“…and contains many useful references. Poquérusse & Alexiou (2006) have extended standard semi-classical impact theory for hydrogen-like ions to include penetrating collisions. For transitions in highly excited hydrogen-like atoms and ions Stambulchik & Maron (2008) have produced a simple analytical method for calculating line shapes and Gigosos et al (2007) have developed an exact expression for the impact broadening operator of hydrogen.…”

Section: Stark Broadeningmentioning

confidence: 99%

Division Xii / Commission 14 / Working Group Collision Processes

Peach¹,

Dimitrijević²,

Stancil³

2008

Proc. IAU

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Research in atomic and molecular collision processes and spectral line broadening has been very active since our last report (Schultz & Stancil 2007, Allard & Peach 2007). Given the large volume of the published literature and the limited space available, we have attempted to identify work most relevant to astrophysics. Since our report is not comprehensive, additional publications can be found in the databases at the web addresses listed in the final section. Elastic and inelastic collisions among electrons, atoms, ions, and molecules are included and reactive processes are also considered, but except for charge exchange, they receive only sparse coverage.

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Penetrating standard line broadening impact theory for hydrogen-like ions

Cited by 11 publications

References 2 publications

The Fourth Workshop on Lineshape Code Comparison: Line Merging

The Fourth Workshop on Lineshape Code Comparison: Line Merging

The Fourth Workshop on Lineshape Code Comparison: Line Merging

Division Xii / Commission 14 / Working Group Collision Processes

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