Experimental transition probabilities and Stark-broadening parameters of neutral and singly ionized tin

1979 ◽  
Vol 20 (2) ◽  
pp. 499-506 ◽  
Author(s):  
Myron H. Miller ◽  
Randy A. Roig ◽  
Roger D. Bengtson
Keyword(s):  
Transition Probabilities ◽  
Stark Broadening ◽  
Experimental Transition

scholarly journals Laser-Induced Breakdown Spectroscopy for Determination of Spectral Fundamental Parameters

2020 ◽  
Vol 10 (14) ◽  
pp. 4973
Author(s):  
Sabrina Messaoud Aberkane ◽  
Ali Safi ◽  
Asia Botto ◽  
Beatrice Campanella ◽  
Stefano Legnaioli ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Oscillator Strengths ◽  
Stark Broadening ◽  
Future Perspectives ◽  
Fundamental Parameters ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
And Shifts ◽  
Analytical Approaches

In this review, we report and critically discuss the application of LIBS for the determination of plasma-emission fundamental parameters, such as transition probabilities, oscillator strengths, Stark broadening and shifts, of the emission lines in the spectrum. The knowledge of these parameters is of paramount importance for plasma diagnostics or for quantitative analysis using calibration-free LIBS methods. In the first part, the theoretical basis of the analysis is laid down; in the second part, the main experimental and analytical approaches for the determination by LIBS of the spectral line spectroscopic parameters are presented. In the conclusion, the future perspectives of this kind of analysis are discussed.

Experimental Transition Probabilities for Neon i*

1970 ◽  
Vol 60 (8) ◽  
pp. 1093 ◽  
Author(s):  
Roger D. Bengtson ◽  
Myron H. Miller
Keyword(s):  
Transition Probabilities ◽  
Experimental Transition

scholarly journals The FERRUM Project: Experimental transition probabilities of [Fe II] and astrophysical applications

2003 ◽  
Vol 397 (3) ◽  
pp. 1143-1149 ◽  
Author(s):  
H. Hartman ◽  
A. Derkatch ◽  
M. P. Donnelly ◽  
T. Gull ◽  
A. Hibbert ◽  
...  
Keyword(s):  
Transition Probabilities ◽  
Experimental Transition

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).

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