Stark Parameter Regularities of Multiply Charged Ion Spectral Lines Originating from the Same Transition Array

2008 ◽  
Vol 680 (1) ◽  
pp. 803-808 ◽  
Author(s):  
J. Purić ◽  
I. P. Dojčinović ◽  
M. Nikolić ◽  
M. Šćepanović ◽  
B. M. Obradović ◽  
...  
Keyword(s):  
Spectral Lines ◽  
Multiply Charged ◽  
Transition Array

scholarly journals Detailed computation of hot-plasma atomic spectra

2015 ◽  
Vol 33 (2) ◽  
pp. 201-210 ◽  
Author(s):  
Jean-Christophe Pain ◽  
Franck Gilleron ◽  
Thomas Blenski
Keyword(s):  
Hermite Polynomials ◽  
Spectral Lines ◽  
Small Scale ◽  
Detailed Calculation ◽  
Line Broadening ◽  
Huge Number ◽  
Hot Plasma ◽  
The Impact ◽  
Structure Calculations ◽  
Transition Array

AbstractWe present recent evolutions of the detailed opacity code SCO-RCG which combines statistical modelings of levels and lines with fine-structure calculations. The code now includes the Partially Resolved Transition Array model, which allows one to replace a complex transition array by a small-scale detailed calculation preserving energy and variance of the genuine transition array and yielding improved higher-order moments. An approximate method for studying the impact of strong magnetic field on opacity and emissivity was also recently implemented. The Zeeman line profile is modeled by fourth-order Gram-Charlier expansion series, which is a Gaussian multiplied by a linear combination of Hermite polynomials. Electron collisional line broadening is often modeled by a Lorentzian function and one has to calculate the convolution of a Lorentzian with Gram-Charlier distribution for a huge number of spectral lines. Since the numerical cost of the direct convolution would be prohibitive, we propose, to obtain the resulting profile, a fast and precise algorithm, relying on a representation of the Gaussian by cubic splines.

Temporal behavior of unresolved transition array emission in water window soft x-ray spectral region from multiply charged ions

2015 ◽  
Vol 107 (12) ◽  
pp. 121101 ◽  
Author(s):  
Thanh-Hung Dinh ◽  
Yuhei Suzuki ◽  
Goki Arai ◽  
Bowen Li ◽  
Padraig Dunne ◽  
...  
Keyword(s):  
Spectral Region ◽  
Temporal Behavior ◽  
Multiply Charged Ions ◽  
X Ray ◽  
Water Window ◽  
Multiply Charged ◽  
Charged Ions ◽  
Transition Array

scholarly journals Stark widths of astrophysically important four- and five-times charged ion lines

1994 ◽  
Vol 162 ◽  
pp. 335-336
Author(s):  
Milan S. Dimitrijević
Keyword(s):  
Spectral Line ◽  
High Temperatures ◽  
Energy Transport ◽  
Spectral Lines ◽  
Stark Broadening ◽  
Atomic Processes ◽  
Multiply Charged ◽  
Extreme Uv ◽  
Stellar Interiors ◽  
Charged Ions

Important astrophysical applications of Stark broadening of spectral lines of multiply charged ions are in the physics of stellar interiors (Seaton 1987). In subphotospheric layers, the modelling of energy transport requires radiative opacities and thus, certain atomic processes must be known accurately. At these high temperatures (105 K or more) and densities (1017 − 1022 cm-3) Stark broadening of strong multicharged ionic lines plays a non-negligible role in the calculation of the opacities, especially in the UV. Moreover, with the development of spectroscopic investigations from space, UV and extreme UV spectral line research has been further stimulated.

scholarly journals Stark Broadening of Isolated Lines from Multiply Charged Ions

1977 ◽  
Vol 43 ◽  
pp. 24-24
Author(s):  
J. D. Hey
Keyword(s):  
Spectral Lines ◽  
Oscillator Strengths ◽  
Stark Broadening ◽  
Multiply Charged Ions ◽  
Multiply Charged ◽  
Configuration Mixing ◽  
Lower Temperature ◽  
The Relationship ◽  
Bound Electrons ◽  
Charged Ions

When calculating the Stark widths of isolated lines of multiply charged ions with several bound electrons, radiated by dense, hot plasmas, the existing theories of Stark broadening which have been applied mainly to lower-temperature measurements on singly-ionized species, need to be modified in several respects. These modifications involve taking more careful account of the complexities of the particular atomic structure: e.g. deviations from LS coupling, configuration mixing, and optically forbidden transitons. Earlier work, showing explicitly the relationship between the Stark widths and the oscillator strengths for the collision-induced transitions Which contribute to the width, is extended. Some of the principles involved will be discussed and, if time permits, comparison will be made between calculations and the results of several critically selected experiments on spectral lines in the near UV (2000-3500 Å).

scholarly journals Stark Width Data for Tb II, Tb III and Tb IV Spectral Lines

Data ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 28
Author(s):  
Milan S. Dimitrijević
Keyword(s):  
Electron Density ◽  
Semiempirical Method ◽  
Spectral Lines ◽  
Stark Width ◽  
Transition Array

A dataset of Stark widths for Tb II, Tb III and Tb IV is presented. To data obtained before, the results of new calculations for 62 Tb III lines from 5d to 6pj(6,j)o, a transition array, have been added. Calculations have been performed by using the simplified modified semiempirical method for temperatures from 5000 to 80,000 K for an electron density of 1017 cm−3. The results were also used to discuss the regularities within multiplets and a supermultiplet.

Precision measurements of wavelengths of x-ray spectral lines of multiply charged ions in a recombining laser plasma

1992 ◽  
Vol 22 (9) ◽  
pp. 853-855 ◽  
Author(s):  
B A Bryunetkin ◽  
S A Pikuz ◽  
I Yu Skobelev ◽  
A Ya Faenov ◽  
B K Khabibulaev ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Spectral Lines ◽  
Precision Measurements ◽  
Multiply Charged Ions ◽  
X Ray ◽  
Multiply Charged ◽  
Charged Ions
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