J/MNRAS/454/1736 Stark broadening of XeVIII spectral lines (Dimitrijevic+, 2015)
Stark broadening of Xe VIII spectral lines.
Dimitrijevic M.S., Simic Z., Kovacevic A., Valjarevic A., Sahal-Brechot S.
<Mon. Not. R. Astron. Soc., 454, 1736-1741 (2015)>
=2015MNRAS.454.1736D 2015MNRAS.454.1736D (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics ; Line Profiles
Keywords: atomic data - atomic processes - line: formation
Abstract:
Stark broadening parameters have been calculated for 60 spectral lines
of XeVIII, for broadening by electron, proton, and HeIII impacts. For
calculations, the semiclassical perturbation approach in the impact
approximation has been used. The widths and shifts are provided for
temperatures from 20000 K to 500000 K and for an electron density of
1017/cm3. Obtained results have been used to study the influence of
Stark broadening on spectral lines in DO white dwarf atmospheres and
it has been found that exist broad layers where this broadening
mechanism is dominant in comparison with thermal Doppler broadening.
Description:
By means of the code based on semiclassical perturbation theory we have
calculated widths and shifts for 60 transitions of Xe VIII. The needed
energy levels have been taken from Saloman (2004JPCRD..33..765S 2004JPCRD..33..765S).
Oscillator strengths have been calculated by using the method of
Bates & Damgaard (1949RSPTA.242..101B 1949RSPTA.242..101B) and the tables of Oertel & Shomo
(1968ApJS...16..175O 1968ApJS...16..175O). For higher levels, oscillator strengths have
been calculated according to Van Regemorter, Hoang Binh & Prud'homme
(1979, J. Phys. B, 12, 1073).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 115 360 Stark broadening parameters for Xe VIII spectral
lines, for a perturber density of 1017/cm3
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See also:
J/A+AS/116/359 : Xe II lines Stark broadening (Popovic+, 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 27 A27 --- Trans Transition identification
29- 34 F6.1 0.1nm lambda Calculated wavelength of the transition (Å)
36- 43 E8.3 --- C Parameter C (Dimitrijevic & Sahal-Brechot
1984JQSRT..31..301D 1984JQSRT..31..301D) (1)
45- 50 I6 K Temp [20000/500000] Temperature
52- 60 E9.4 0.1nm We Electron-impact full Stark width at half-maximum
of intensity (Å)
62- 71 E10.4 0.1nm de Electron-impact Stark shift (Å)
73- 81 E9.4 0.1nm WH+ Proton-impact full Stark width at half-maximum
of intensity (Å)
83- 92 E10.4 0.1nm dH+ Proton-impact Stark shift (Å)
94-102 E9.5 0.1nm WHe++ Doubly charged helium ion-impact full Stark
width at half-maximum of intensity (Å)
103 A1 --- n_WHe++ [*] Note on WHe++ (2)
105-114 E10.4 0.1nm dHe++ Doubly charged helium ion-impact Stark shift
(Å)
115 A1 --- n_dHe++ [*] Note on dHe++ (2)
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Note (1): This parameter, when divided with the corresponding Stark width,
gives an estimate for the maximal pertuber density for which the line
may be treated as isolated.
Note (2): Note as follows:
* = For 0.1<NV=<0.5 Stark broadening parameters are preceded by an asterisk
in order to draw attention that the impact approximation reaches his limit
of validity (we denote with V the collision volume and N the perturber
density).
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History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 12-Jan-2018