scholarly journals Electron broadening of the resonance lines of Ar+17 and Ar+16

2012 ◽  
Vol 61 (4) ◽  
pp. 043204
Author(s):  
Duan Bin ◽  
Wu Ze-Qing ◽  
Yan Jun ◽  
Li Yue-Ming ◽  
Wang Jian-Guo
Keyword(s):  
Electron Broadening

scholarly journals Density-matrix correlations in the relaxation theory of electron broadening

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
T. A. Gomez ◽  
T. Nagayama ◽  
D. P. Kilcrease ◽  
M. H. Montgomery ◽  
D. E. Winget
Keyword(s):  
Density Matrix ◽  
Relaxation Theory ◽  
Electron Broadening

Electron Broadening and Shift of Spectral Lines of Helium

1955 ◽  
Vol 98 (4) ◽  
pp. 1055-1060 ◽  
Author(s):  
Bennett Kivel
Keyword(s):  
Spectral Lines ◽  
Electron Broadening

scholarly journals New Results on Electron Broadening of Some UV Lines of NII, CII/IV and SiII/III/IV

1971 ◽  
Vol 2 ◽  
pp. 566-574 ◽  
Author(s):  
S. Sahal-Brechot ◽  
E. Segre
Keyword(s):  
Experimental Results ◽  
Astrophysical Interest ◽  
Electron Broadening ◽  
Semiclassical Approximations ◽  
The Impact

AbstractThe electron damping constants of some UV lines of astrophysical interest are calculated within the impact and semiclassical approximations and are compared with experimental results where these are available (NII, UV(1) and CII, UV (1)).

scholarly journals Stark-Broadening of Ar K-Shell Lines: A Comparison between Molecular Dynamics Simulations and MERL Results

Atoms ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 9
Author(s):  
Marco A. Gigosos ◽  
Roberto C. Mancini ◽  
Juan M. Martín-González ◽  
Ricardo Florido
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Computer Simulations ◽  
High Energy ◽  
Line Profiles ◽  
Interacting Particles ◽  
X Ray ◽  
Line Shapes ◽  
Electron Broadening ◽  
Dynamics Simulations

Analysis of Stark-broadened spectral line profiles is a powerful, non-intrusive diagnostic technique to extract the electron density of high-energy-density plasmas. The increasing number of applications and availability of spectroscopic measurements have stimulated new research on line broadening theory calculations and computer simulations, and their comparison. Here, we discuss a comparative study of Stark-broadened line shapes calculated with computer simulations using non-interacting and interacting particles, and with the multi-electron radiator line shape MERL code. In particular, we focus on Ar K-shell X-ray line transitions in He- and H-like ions, i.e., Heα, Heβ and Heγ in He-like Ar and Lyα, Lyβ and Lyγ in H-like Ar. These lines have been extensively used for X-ray spectroscopy of Ar-doped implosion cores in indirect- and direct-drive inertial confinement fusion (ICF) experiments. The calculations were done for electron densities ranging from 1023 to 3×1024 cm−3 and a representative electron temperature of 1 keV. Comparisons of electron broadening only and complete line profiles including electron and ion broadening effects, as well as Doppler, are presented. Overall, MERL line shapes are narrower than those from independent and interacting particles computer simulations performed at the same conditions. Differences come from the distinctive treatments of electron broadening and are more pronounced in α line transitions. We also discuss the recombination broadening mechanism that naturally emerges from molecular dynamics simulations and its influence on the line shapes. Furthermore, we assess the impact of employing either molecular dynamics or MERL line profiles on the diagnosis of core conditions in implosion experiments performed on the OMEGA laser facility.

Discussion of the validity of binary collision models for electron broadening in plasmas

2000 ◽  
Vol 65 (1-3) ◽  
pp. 109-116 ◽  
Author(s):  
A Calisti ◽  
S Ferri ◽  
R Stamm ◽  
B Talin ◽  
R.W Lee ◽  
...  
Keyword(s):  
Binary Collision ◽  
Electron Broadening ◽  
Collision Models

scholarly journals Electron Broadening Operator Including Penetrating Collisions for Hydrogen

Atoms ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 2
Author(s):  
Jean-Christophe Pain ◽  
Franck Gilleron
Keyword(s):  
Impact Parameter ◽  
Special Functions ◽  
Collision Operator ◽  
Wave Functions ◽  
Standard Theory ◽  
Electron Collision ◽  
Electron Wave ◽  
Approximate Form ◽  
Electron Broadening ◽  
Bound Electron

The expression of the electron broadening operator including the effect of penetrating collisions, i.e., for which the incoming electron enters the extent of bound-electron wave-functions, is rather complicated, even for hydrogen. It involves integrals of special functions, the evaluation of which deserves scrutiny. We present a simple approximate form of the electron collision operator for hydrogen including penetration effects, both in direct and interference terms. The new expression is accurate and easy to compute. In the Penetration Standard Theory, the collision operator is convergent whatever the value of the maximum impact parameter. However, when penetration theory is not valid anymore, it should be questioned. We discuss the problem of strong collisions when penetration effects are taken into account.

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