Semiempirical determination of electronic-vibro-rotational radiative transition probabilities in diatomic molecules I. Theory

1990 ◽  
Vol 67 (1-2) ◽  
pp. 3-26
Author(s):  
B. P. Lavrov ◽  
V. I. Ustimov
Keyword(s):  
Transition Probabilities ◽  
Diatomic Molecules ◽  
Radiative Transition

scholarly journals Role of Beam Foil Spectroscopy in Understanding Basic Plasma Processes on the Sun

1990 ◽  
Vol 142 ◽  
pp. 439-440
Author(s):  
G. Krishnamurty ◽  
P. Meenakshi Raja Rao ◽  
P. Sarswathy ◽  
B.N. Raja Sekhar
Keyword(s):  
Quantitative Analysis ◽  
Spectral Line ◽  
Transition Probabilities ◽  
Radiative Transition ◽  
Decay Process ◽  
The Sun ◽  
Time Resolved ◽  
Beam Foil

Beam-Foil spectroscopy(BFS) has proved to be a valuable technique for the determination of radiative lifetimes of excited atomic levels leading to the evaluation of the transition probabilities. The time- resolved nature of the decay process in a collisionless environment is a unique characterstic of the beam-foil light source. The relevance of BFS to astrophysics comes from the importance of radiative transition probabilities in the quantitative analysis of optical spectra. Stellar abundances are obtained from the intensity of a spectral line which essentially is a product of the abundance of the element in the source and the probability of the transition. Thus the evaluation of accurate values of transition probabilities contribute significantly to stellar abundance analysis.

scholarly journals Spectroscopic Studies of Er3+-Yb3+ Codoped Multicomposition Tellurite Oxide Glass

2014 ◽  
Vol 895 ◽  
pp. 323-333 ◽  
Author(s):  
Sharudin Omar Baki ◽  
L.S. Tan ◽  
C.S. Kan ◽  
Halimah Mohamed Kamari ◽  
A.S.M. Noor ◽  
...  
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Transition Probabilities ◽  
Branching Ratios ◽  
Spectroscopic Studies ◽  
Oxide Glass ◽  
Near Infrared Spectra ◽  
Intensity Parameters ◽  
Measured Absorption

Multicomposition of Er3+-Yb3+codoped tellurite oxide, TeO2-ZnO-PbO-TiO2-Na2O glass has been investigated. Detailed spectroscopic study of the Judd-Ofelt analysis has been performed from the measured absorption spectrum in order to obtain the intensity parameters Ωt(t=2, 4, 6). The calculated Ωtvalues were then utilized in the determination of transition probabilities, radiative lifetimes and branching ratios of the Er3+transitions between theJ(upper)-J(lower) manifolds. Both visible upconversion and near-infrared spectra were characterized under the 980 nm laser diode excitation at room temperature.

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