scholarly journals Theoretical Study of Transition Probabilities and Stark Broadening Parameters and of Several Spectral Lines with Astrophysical Interest of Double-ionized Thallium

2019 ◽  
Vol 870 (2) ◽  
pp. 131 ◽  
Author(s):  
I. de Andrés-García ◽  
C. Colón-Ruiz ◽  
C. Colón
Keyword(s):  
Theoretical Study ◽  
Transition Probabilities ◽  
Spectral Lines ◽  
Stark Broadening ◽  
Astrophysical Interest

scholarly journals Theoretical study of the Stark broadening for Mg iv spectral lines of astrophysical interest

2016 ◽  
Vol 462 (4) ◽  
pp. 4220-4226
Author(s):  
I. de Andrés-García ◽  
C. You ◽  
A. Alonso-Medina ◽  
C. Colón
Keyword(s):  
Theoretical Study ◽  
Spectral Lines ◽  
Stark Broadening ◽  
Astrophysical Interest

scholarly journals Report on the recent advances performed in the determination of radiative parameters for spectral lines of astrophysical interest in heavy elements

2015 ◽  
Vol 11 (A29A) ◽  
Author(s):  
Pascal Quinet
Keyword(s):  
Atomic Physics ◽  
Periodic Table ◽  
Transition Probabilities ◽  
Spectral Lines ◽  
Heavy Elements ◽  
Radiative Lifetimes ◽  
Astrophysical Interest ◽  
The Past ◽  
Recent Advances

AbstractWe present an overview of the advances made during the past 15 years by the Atomic Physics and Astrophysics Group of Mons University regarding the analysis of the spectra, the transition probabilities, and the radiative lifetimes in heavy elements. More precisely, this review is focused on neutral and lowly ionized atoms belonging to the lanthanide group, the fifth row, and the sixth row of the periodic table (Z = 37–86), for which a very large amount of new data has been obtained.

scholarly journals Theoretical transition probabilities, radiative lifetimes and Stark broadening parameters of singly ionized magnesium

2019 ◽  
Vol 490 (2) ◽  
pp. 1734-1737
Author(s):  
C Moreno-Díaz ◽  
A Alonso-Medina
Keyword(s):  
Transition Probabilities ◽  
Principal Quantum Number ◽  
Stellar Atmospheres ◽  
Spectral Lines ◽  
Atomic Data ◽  
Stark Broadening ◽  
Asymptotic Dependence ◽  
Radiative Lifetimes ◽  
Ionized Magnesium ◽  
Effective Principal

ABSTRACT The presence of spectral lines of singly ionized magnesium (Mg ii) in stellar atmospheres has been reported in different stars. Recently, the low-resolution spectrum obtained from Supernova 2014 J in M82, in which Mg ii absorption lines centred on 4400 Å as well as 7600 Å stand out, has been analysed. This is the motive for the atomic data calculations in this work, which are of much interest in the astrophysical area. In this article, ab initio relativistic Hartree–Fock calculations in an intermediate coupling formalism using Cowan’s code allowed us to obtain the required transition probabilities to calculate the theoretical radiative lifetimes for excited nS−, nP−, nD− and nF− states of singly ionized magnesium. An asymptotic dependence of lifetime (τnl) on the effective principal quantum number (n*) has been determined. Also, the Griem semi-empirical approach was used to obtain the theoretical Stark parameters (width and shift) of spectral lines; these data are displayed for an electron density of 1017 cm−3 and temperatures T = 10–100 (×103 K). We have compared the results of lifetimes for 16 levels and Stark parameters for seven spectral lines with previously reported experiments available in the literature. Finally, we discuss the behaviour of the Stark parameters versus temperature for three relevant spectral lines (2802.70, 2797.99 and 7868.04 Å).

scholarly journals Stark broadening of spectral lines of multicharged ions of astrophysical interest. XXIII. Be III

2003 ◽  
Vol 400 (2) ◽  
pp. 791-793 ◽  
Author(s):  
M. S. Dimitrijević ◽  
M. Dačić ◽  
Z. Cvetković ◽  
S. Sahal-Bréchot
Keyword(s):  
Spectral Lines ◽  
Stark Broadening ◽  
Astrophysical Interest

scholarly journals Stark broadening of several Bi iv spectral lines of astrophysical interest

2017 ◽  
Vol 470 (2) ◽  
pp. 2179-2189 ◽  
Author(s):  
C. Colón ◽  
C. Moreno-Díaz ◽  
I. de Andrés-García ◽  
A. Alonso-Medina
Keyword(s):  
Spectral Lines ◽  
Stark Broadening ◽  
Astrophysical Interest
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