scholarly journals On the Stark Broadening of Be II Spectral Lines

Data ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 106
Author(s):  
Milan S. Dimitrijević ◽  
Magdalena Christova ◽  
Sylvie Sahal-Bréchot
Keyword(s):  
Perturbation Theory ◽  
Plasma Diagnostics ◽  
Spectral Lines ◽  
Spectral Series ◽  
Stark Broadening ◽  
Stark Width

Calculated Stark broadening parameters of singly ionized beryllium spectral lines have been reported. Three spectral series have been studied within semiclassical perturbation theory. The plasma conditions cover temperatures from 2500 to 50,000 K and perturber densities 1011 cm−3 and 1013 cm−3. The influence of the temperature and the role of the perturbers (electrons, protons and He+ ions) on the Stark width and shift have been discussed. Results could be useful for plasma diagnostics in astrophysics, laboratory, and industrial plasmas.

scholarly journals Stark Width Regularities within Neutral Calcium Spectral Series

2012 ◽  
Vol 29 (1) ◽  
pp. 20-28 ◽  
Author(s):  
I. Tapalaga ◽  
I. P. Dojčinović ◽  
M. K. Milosavljević ◽  
J. Purić
Keyword(s):  
Term Structure ◽  
Low Temperatures ◽  
Spectral Lines ◽  
Spectral Series ◽  
Stark Broadening ◽  
Proton Impact ◽  
Transition Level ◽  
Lower Transition ◽  
Upper Level ◽  
Stark Width

AbstractDependences of electron and proton impact Stark width on the upper level ionization potential within different series of the neutral calcium spectral lines have been evaluated and discussed. The similar dependences previously found for the electron impact contribution were also obtained for the proton impact contribution to the Stark broadening. The emphasis is on the term structure influence on the studied Stark width dependences. The influence of the lower transition level and transition term is higher at low temperatures. After establishing these dependences, predictions were made for Stark widths of neutral calcium spectral lines not measured experimentally or calculated theoretically until now.

scholarly journals Stark Width Regularities within Beryllium Spectral Series

2011 ◽  
Vol 28 (4) ◽  
pp. 281-289 ◽  
Author(s):  
I. P. Dojčinović ◽  
I. Tapalaga ◽  
J. Purić
Keyword(s):  
Fine Structure ◽  
Ionization Potential ◽  
Electron Impact ◽  
Spectral Lines ◽  
Spectral Series ◽  
Stark Broadening ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Upper Level ◽  
Stark Width

AbstractThe dependences of Stark width on the upper-level ionization potential within different series of the neutral beryllium spectral lines have been studied. The dependences previously observed for electron impact contribution to the Stark widths were also obtained for the proton impact contribution. The emphasis is on the fine structure influence on the studied Stark parameter dependences. The influence of temperature on the dependences of Stark width parameters has been demonstrated. The relations found can be used in both cases for prediction of new Stark broadening data, thus avoiding much more complicated procedures.

scholarly journals The Semiclassical Limit of the Gailitis Formula Applied to Electron Impact Broadening of Spectral Lines of Ionized Atoms

Atoms ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 29
Author(s):  
Sylvie Sahal-Bréchot
Keyword(s):  
Electron Impact ◽  
Classical Limit ◽  
Semiclassical Limit ◽  
Spectral Lines ◽  
Stark Broadening ◽  
Feshbach Resonances

The present paper revisits the determination of the semi-classical limit of the Feshbach resonances which play a role in electron impact broadening (the so-called “Stark“ broadening) of isolated spectral lines of ionized atoms. The Gailitis approximation will be used. A few examples of results will be provided, showing the importance of the role of the Feshbach resonances.

scholarly journals Stark Broadening of Several Ar I Spectral Lines in the Visible Spectrum

2011 ◽  
Vol 20 (4) ◽  
Author(s):  
Milan S. Dimitrijević ◽  
Andjelka Kovačević ◽  
Zoran Simić ◽  
Sylvie Sahal-Bréchot
Keyword(s):  
Perturbation Theory ◽  
Data Center ◽  
Visible Spectrum ◽  
Molecular Data ◽  
Complete Data ◽  
Spectral Lines ◽  
Stark Broadening ◽  
And Shifts

AbstractIn order to complete data on Stark broadening parameters for Ar I line in the visible spectrum, we determined Stark widths and shifts due to electron, proton and ionized helium impacts for nine lines (4191.0, 4259.4, 5912.1, 6043.2, 6045.0, 6752.9, 7503.9, 7514.6, 7724.2 Å), using jK coupling and semiclassical perturbation theory. The obtained results will enter the STARK-B database, which is a part of the Virtual Atomic and Molecular Data Center.

Stark broadening of Co ii spectral lines in hot stars and white dwarf spectra

2020 ◽  
Vol 496 (4) ◽  
pp. 5584-5590 ◽  
Author(s):  
Zlatko Majlinger ◽  
Milan S Dimitrijević ◽  
Vladimir A Srećković
Keyword(s):  
White Dwarf ◽  
Empirical Method ◽  
Spectral Lines ◽  
Half Maximum ◽  
Stark Broadening ◽  
Hot Stars ◽  
Approximate Methods ◽  
Semi Empirical ◽  
Stark Width

ABSTRACT Stark full widths at half-maximum for 46 Co ii multiplets have been calculated using modified semi-empirical method. The obtained results have been used to demonstrate the importance of Stark broadening mechanism in DA and DB white dwarf and A star atmospheres. With the obtained results we also test possibility of using some approximate methods of Stark width calculations developed on the basis of regularities and systematic trends.

Study of Stark broadening of Li i 460 and 497 nm spectral lines with independent plasma diagnostics by Thomson scattering

2018 ◽  
Vol 27 (2) ◽  
pp. 025013
Author(s):  
Krzysztof Dzierżȩga ◽  
Tomasz Piȩta ◽  
Witold Zawadzki ◽  
Evgeny Stambulchik ◽  
Marijana Gavrilović-Božović ◽  
...  
Keyword(s):  
Plasma Diagnostics ◽  
Thomson Scattering ◽  
Spectral Lines ◽  
Stark Broadening

scholarly journals Stark Broadening of Neutral Boron Lines

Atoms ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 80
Author(s):  
Magdalena Christova ◽  
Milan S. Dimitrijević ◽  
Sylvie Sahal-Bréchot
Keyword(s):  
Temperature Dependence ◽  
Classical Theory ◽  
Plasma Diagnostics ◽  
Spectral Series ◽  
Stark Broadening ◽  
Impact Approximation

Stark broadening parameters, width and shift, of lines within B I 2s22p–2s2ns spectral series have been calculated. Semi-classical theory in impact approximation has been applied. Temperature dependence of Stark parameters has been studied. The presented results could be applied for plasma diagnostics.

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