Far‐Infrared Collision‐Induced Absorption in CO2. I. Temperature Dependence

1971 ◽  
Vol 55 (3) ◽  
pp. 1028-1038 ◽  
Author(s):  
W. Ho ◽  
G. Birnbaum ◽  
A. Rosenberg
Keyword(s):  
Temperature Dependence ◽  
Far Infrared ◽  
Induced Absorption

The temperature dependence of collision-induced absorption by oxygen near 6 μm

1991 ◽  
Vol 96 (D11) ◽  
pp. 20755 ◽  
Author(s):  
John J. Orlando ◽  
Geoffrey S. Tyndall ◽  
Karen E. Nickerson ◽  
Jack G. Calvert
Keyword(s):  
Temperature Dependence ◽  
Induced Absorption

COLLISION-INDUCED ABSORPTION OF COMPRESSED GASES IN THE FAR INFRARED, PART I

1965 ◽  
Vol 43 (5) ◽  
pp. 729-750 ◽  
Author(s):  
D. R. Bosomworth ◽  
H. P. Gush
Keyword(s):  
Fourier Analysis ◽  
Infrared Absorption ◽  
Michelson Interferometer ◽  
Far Infrared ◽  
Gas Mixtures ◽  
Experimental Techniques ◽  
Rare Gas ◽  
Absorption Coefficients ◽  
Induced Absorption ◽  
Separate Paper

A study is being made of the far infrared absorption occurring in compressed rare-gas mixtures, and compressed homonuclear diatomic gases. The region investigated lies between 20 and 400 cm−1. The spectra are obtained from the Fourier analysis of interferograms produced by a dynamic Michelson interferometer. It is possible to obtain accurate absolute absorption coefficients for broad bands using this method provided care is exercised in the analysis of the interferograms. The necessary precautions are discussed in detail. The precision of the method obtained in practice is demonstrated using the far infrared bands of hydrogen and nitrogen as examples. Only the experimental techniques are discussed in this paper; the detailed results follow in a separate paper.

Pressure-induced absorption in nonpolar gases containing tetrahedral molecules

1976 ◽  
Vol 54 (5) ◽  
pp. 611-617 ◽  
Author(s):  
A. D. Buckingham ◽  
A. J. C. Ladd
Keyword(s):  
Dipole Moment ◽  
Field Gradient ◽  
Infrared Radiation ◽  
Far Infrared ◽  
Spectral Moment ◽  
Induced Absorption ◽  
Integrated Intensity ◽  
Tetrahedral Molecules ◽  
Spherical Molecule ◽  
Far Infrared Radiation

The theory of pressure-induced absorption of far infrared radiation by gases is extended to include the contribution of the dipole moment induced in a molecule by the field gradient due to its neighbours. This dipole is nonzero when the molecule lacks a centre of inversion, as in a tetrahedron. In the collision of two tetrahedra, the dipole induced in molecule 2 by the electric field of the octopole moment Ω1 of the partner leads to transitions in which ΔJ(1) = 0, ± 1, ±2, ±3, and ΔJ(2) = 0. The dipole induced by the field gradient of Ω1 leads to ΔJ(1) = 0, ±1, ±2, ±3, and ΔJ(2) = 0, ±1, ±2, ±3, and therefore gives a required increase in absorption at higher frequencies. The field-gradient contribution vanishes in a collision involving a tetrahedral and a spherical molecule. General expressions are given for the field-gradient contributions to the integrated intensity and to the −2 spectral moment.

Collision-induced absorption in ethane–rare gas mixtures

1983 ◽  
Vol 61 (4) ◽  
pp. 633-640 ◽  
Author(s):  
I. R. Dagg ◽  
L. A. A. Read ◽  
A. Anderson
Keyword(s):  
Fourier Transform ◽  
Temperature Dependence ◽  
Quadrupole Moment ◽  
Gas Mixtures ◽  
Rare Gas ◽  
Fourier Transform Spectrometer ◽  
Rare Gases ◽  
Induced Absorption ◽  
Absolute Value ◽  
The Absolute

The collision-induced spectra of mixtures of ethane and each of the rare gases He, Ar, Kr, and Xe in the 40–360 cm−1 region have been obtained using a Michelson Fourier transform spectrometer. In addition, the temperature dependence of the absorption in ethane and ethane–xenon mixtures is reported. All results have been analyzed according to the theory for quadrupole induced rotation–translation absorption. The absolute value of the quadrupole moment of ethane is estimated to be less than 1.0 B and most likely less than 0.5 B. Various speculations are made concerning the induction mechanisms (other than quadrupolar) for each of the mixtures.

Temperature dependence of far-infrared difference reflectivity ofYBa2Cu3O7−y

1989 ◽  
Vol 39 (10) ◽  
pp. 6716-6726 ◽  
Author(s):  
H. Krenn ◽  
G. Bauer ◽  
G. Vogl ◽  
G. Strasser ◽  
E. Gornik
Keyword(s):  
Temperature Dependence ◽  
Far Infrared

Far-infrared interaction-induced absorption spectra of CS2C6H6 liquid mixtures

1992 ◽  
Vol 168 (2-3) ◽  
pp. 349-356 ◽  
Author(s):  
Evangelos Zoidis ◽  
Jannis Samios ◽  
Thomas Dorfmüller
Keyword(s):  
Absorption Spectra ◽  
Far Infrared ◽  
Liquid Mixtures ◽  
Induced Absorption

Collision-induced absorption in the fundamental band of N_2: temperature dependence of the absorption for N_2–N_2 and N_2–O_2 pairs

1993 ◽  
Vol 32 (3) ◽  
pp. 263 ◽  
Author(s):  
V. Menoux ◽  
R. Le Doucen ◽  
C. Boulet ◽  
A. Roblin ◽  
A. M. Bouchardy
Keyword(s):  
Temperature Dependence ◽  
Fundamental Band ◽  
Induced Absorption
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