scholarly journals On the stark width regularities along the argon isonuclear sequence

1998 ◽  
pp. 25-29 ◽  
Author(s):  
S. Djenize ◽  
A. Sreckovic
Keyword(s):  
Spectral Lines ◽  
Astrophysical Interest ◽  
Stark Width

Recent values of the measured spectral lines Stark widths (since 1988) for neutral and ionized argon atoms, have been compared to the values previously predicted by us. These were found from the established regularities of the Stark widths along the argon isonuclear sequence for 4s-4p and 4s'-4p' types of transitions. Using new experimental Stark width values we have established trends for 4p-4d, 4p'-4d' and 4p-5s type of transitions which enables predictions of the Stark width values for the Ar III and Ar VIII spectral lines, that have not been calculated or measured before, but are of a considerable astrophysical interest.

Measurement of Dysprosium Stark Width and the Electron Impact Width Parameter

2018 ◽  
Vol 73 (2) ◽  
pp. 203-213 ◽  
Author(s):  
Jhonatha R. dos Santos ◽  
Jonas Jakutis Neto ◽  
N. Rodrigues ◽  
M.G. Destro ◽  
José W. Neri ◽  
...  
Keyword(s):  
Electron Density ◽  
Impact Parameter ◽  
Plasma Temperature ◽  
Spectral Lines ◽  
Emission Lines ◽  
Spectroscopic Methods ◽  
Species Concentration ◽  
The Impact ◽  
Stark Width

In this work, we suggest a methodology to determine the impact parameter for neutral dysprosium emission lines from the characterization of the plasma generated by laser ablation in a sealed chamber filled with argon. The procedure is a combination of known consistent spectroscopic methods for plasma temperature determination, electron density, and species concentration. With an electron density of 3.1 × 1018 cm–3 and temperature close to 104 K, we estimated the impact electron parameter for nine spectral lines of the neutral dysprosium atom. The gaps in the impact parameter data in the literature, mainly for heavy elements, stress the importance of the proposed method.

THE CALCULATION OF LINE STRENGTHS FROM LABORATORY DATA

1947 ◽  
Vol 25a (1) ◽  
pp. 42-48
Author(s):  
William Petrie
Keyword(s):  
Laboratory Data ◽  
Spectral Lines ◽  
Astrophysical Interest ◽  
Line Strengths

A. S. King has made extensive intensity estimates of spectral lines in furnace and are spectra, and these data provide useful material for determining line strengths. The estimates have been made for many elements of astrophysical interest, and are reduced to line strengths for FeI, TiI, and TiII.

scholarly journals Stark Width Regularities within Neutral Calcium Spectral Series

2012 ◽  
Vol 29 (1) ◽  
pp. 20-28 ◽  
Author(s):  
I. Tapalaga ◽  
I. P. Dojčinović ◽  
M. K. Milosavljević ◽  
J. Purić
Keyword(s):  
Term Structure ◽  
Low Temperatures ◽  
Spectral Lines ◽  
Spectral Series ◽  
Stark Broadening ◽  
Proton Impact ◽  
Transition Level ◽  
Lower Transition ◽  
Upper Level ◽  
Stark Width

AbstractDependences of electron and proton impact Stark width on the upper level ionization potential within different series of the neutral calcium spectral lines have been evaluated and discussed. The similar dependences previously found for the electron impact contribution were also obtained for the proton impact contribution to the Stark broadening. The emphasis is on the term structure influence on the studied Stark width dependences. The influence of the lower transition level and transition term is higher at low temperatures. After establishing these dependences, predictions were made for Stark widths of neutral calcium spectral lines not measured experimentally or calculated theoretically until now.

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.

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