Spectral lineshapes of collision-induced absorption (CIA) and collision-induced light scattering (CILS) for molecular nitrogen using isotropic intermolecular potential. New insights and perspectives

2014 ◽  
Vol 440 ◽  
pp. 127-134 ◽  
Author(s):  
M.S.A. El-Kader ◽  
S.I. Mostafa ◽  
T. Bancewicz ◽  
G. Maroulis
Keyword(s):  
Light Scattering ◽  
Molecular Nitrogen ◽  
Intermolecular Potential ◽  
Induced Absorption

Spectral lineshapes of collision-induced absorption (CIA) using isotropic intermolecular potential for N2-CH4

2021 ◽  
Vol 21 (4) ◽  
pp. 1063-1078
Author(s):  
M.S.A. El-Kader ◽  
G. Maroulis ◽  
T. Bancewicz
Keyword(s):  
Potential Model ◽  
Dipole Moments ◽  
Molecular Nitrogen ◽  
Intermolecular Potential ◽  
Gaseous Mixtures ◽  
Induced Absorption ◽  
Induced Dipole ◽  
Different Temperatures ◽  
Experimental Absorption ◽  
Good Agreement

Quantum mechanical lineshapes of collision-induced absorption (CIA) at different temperatures are computed for gaseous mixtures of molecular nitrogen and methane using theoretical values for the induced dipole moments and intermolecular potential as input. Comparison with theoretical absorption spectra shows satisfactory agreement. An empirical model of the dipole moment which reproduces the experimental spectra and the first three spectral moments more closely than the fundamental theory, is also presented. Good agreement between computed and experimental absorption lineshapes is obtained when a potential model which is constructed from the thermophysical and transport properties is used.

Collision-Induced Absorption and Light Scattering

2008 ◽  
pp. 275-302 ◽  
Author(s):  
Jean-Michel Hartmann ◽  
Christian Boulet ◽  
Daniel Robert
Keyword(s):  
Light Scattering ◽  
Induced Absorption

Temperature dependent collision-induced absorption in nitrogen

1984 ◽  
Vol 62 (4) ◽  
pp. 338-347 ◽  
Author(s):  
N. W. B. Stone ◽  
L. A. A. Read ◽  
A. Anderson ◽  
I. R. Dagg ◽  
W. Smith
Keyword(s):  
Close Agreement ◽  
Far Infrared ◽  
Intermolecular Potential ◽  
Fourier Transform Spectrometer ◽  
Fir Laser ◽  
Complete Spectrum ◽  
Temperature Dependent ◽  
Induced Absorption ◽  
Different Temperatures ◽  
Microwave Data

The collision-induced rotational translational spectrum of gaseous N2 has been measured in the temperature range 228–343 K at six different temperatures. The measurements were made with a Fourier transform spectrometer in the 25 to 360 cm−1 region and at 15.1 and 84.2 cm−1 with far infrared (FIR) laser. Previously obtained microwave data at 2.3 and 4.7 cm−1 have been used in defining the complete spectrum. Using a recently developed theory for quadrupolar-induced absorption, we find that the calculated quadrupole moment is independent of temperature and has a magnitude in close agreement with the recommended values of several other workers; i.e., Q = 1.46 B. The calculated value depends on the particular form of the intermolecular potential and this dependence is examined in some detail. A contribution to the absorption originating primarily from hexadecapolar and overlap induction has been observed in agreement with theoretical estimates and leads to an estimated value for the hexadecapolar moment [Formula: see text].

Sign in / Sign up

Export Citation Format

Share Document