Global fitting of vibration-rotation line positions of acetylene molecule in the far- and middle-infrared regions

2004 ◽  
Author(s):  
Oleg M. Lyulin ◽  
Valery I. Perevalov ◽  
Jean-Luc Teffo
Keyword(s):  
Acetylene Molecule ◽  
Rotation Line ◽  
Vibration Rotation ◽  
Middle Infrared ◽  
Line Positions ◽  
Global Fitting

Global fitting of the vibrational-rotational line positions of the acetylene molecule

2000 ◽  
Author(s):  
Oleg M. Lyulin ◽  
Valery I. Perevalov ◽  
Sergey A. Tashkun ◽  
Jean-Luc Teffo
Keyword(s):  
Rotational Line ◽  
Acetylene Molecule ◽  
Line Positions ◽  
Global Fitting

INFLUENCE OF VIBRATION–ROTATION INTERACTION ON THE INTENSITIES OF PURE ROTATION LINES OF DIATOMIC MOLECULES

1956 ◽  
Vol 34 (11) ◽  
pp. 1119-1125 ◽  
Author(s):  
Robert Herman ◽  
Robert J. Rubin
Keyword(s):  
Line Intensity ◽  
Anharmonic Oscillator ◽  
Diatomic Molecules ◽  
Potential Energy Function ◽  
Complete Agreement ◽  
Contact Transformation ◽  
First Order ◽  
Pure Rotation ◽  
Rotation Line ◽  
Vibration Rotation

The magnitude of the effect of the vibration–rotation interaction on the intensities of pure rotation lines of diatomic molecules has been calculated for two different molecular models, the anharmonic oscillator and the rotating Morse or Pekeris oscillator. The intensity correction for the anharmonic oscillator has been obtained by adapting the contact transformation formalism for calculating second-order corrections to the energy to the calculation of first-order corrections to the matrix elements of the electric moment as suggested by H. H. Nielsen. The correction to the line intensity for vibrationless transitions of the anharmonic oscillator is found to be[Formula: see text]The results obtained here are also in complete agreement, to first order, with the results obtained earlier by Herman and Wallis for the 1–0 and 2–0 vibration–rotation line intensities. In the case of the Pekeris or rotating Morse oscillator the correction to the pure rotation line intensity is of the same form as above, namely,[Formula: see text]but exhibits minor differences which can be explained in terms of the difference in the vibrational potential energy function in the two cases.

Calculation of the vibration-rotation line intensities in the Raman spectra of gases

1988 ◽  
Vol 19 (8) ◽  
pp. 523-533 ◽  
Author(s):  
A. E. Cheglokov ◽  
O. N. Ulenikov ◽  
V. N. Cherepanov ◽  
Yu. S. Makushkin
Keyword(s):  
Raman Spectra ◽  
Line Intensities ◽  
Rotation Line ◽  
Vibration Rotation
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