The collision-induced translational spectrum of CF4–He gas mixtures

1980 ◽  
Vol 58 (6) ◽  
pp. 836-839 ◽  
Author(s):  
A. D. Afanasev ◽  
M. O. Bulanin ◽  
M. V. Tonkov
Keyword(s):  
Dipole Moment ◽  
Infrared Spectrum ◽  
Far Infrared ◽  
Gas Mixtures ◽  
Moment Function ◽  
Band Shape ◽  
Induced Dipole

The collision-induced far infrared spectrum of CF4–He gas mixtures was measured at 213 K. It is shown that the observed enhancement of the absorption represents the translational spectrum induced by isotropic overlap forces. The band shape calculations are consistent with the assumption that the collision-induced dipole moment varies exponentially with intermolecular separation, and the parameters of the dipole moment function have been determined.

On the Theory of Collision-Induced Absorption in Rare Gas Mixtures

1971 ◽  
Vol 49 (7) ◽  
pp. 837-847 ◽  
Author(s):  
S. L. Brenner ◽  
D. A. McQuarrie
Keyword(s):  
Absorption Spectrum ◽  
Dipole Moment ◽  
Far Infrared ◽  
Gas Mixtures ◽  
Moment Function ◽  
Rare Gas ◽  
Induced Absorption ◽  
Induced Dipole ◽  
Calculated Equilibrium

The observed far-infrared collision-induced absorption of helium–argon mixtures is used to determine the parameters in an induced-dipole moment function of the form[Formula: see text]It is shown that, with this form of μ(r), the values of the constants μo, ρ, and c7 that are necessary to fit the first two moments of the observed absorption contour are in disagreement with the available theoretical values of these constants. Possible explanations for this disagreement are discussed in the paper. Finally, it is shown that if μ(r) were known, it is possible to obtain an excellent representation of the entire absorption spectrum from a knowledge of only the first three moments, which are easily calculated equilibrium quantities.

scholarly journals A Study on the Transversal Optical Mode in Amorphous Gallium Arsenide

1998 ◽  
Vol 21 (3) ◽  
pp. 209-211
Author(s):  
M. A. Grado-Caffaro ◽  
M. Grado-Caffaro
Keyword(s):  
Gallium Arsenide ◽  
Dipole Moment ◽  
Matrix Element ◽  
Infrared Spectrum ◽  
Far Infrared ◽  
Moment Matrix ◽  
Optical Mode ◽  
Structural Disorders

Contributions to the far-infrared spectrum corresponding to both dynamical and structural disorders in a-GaAs are examined when frequency coincides with the transversal optical mode. Under these circumstances, dipole moment matrix element is discussed.

Infrared Spectrum and Dipole Moment Function of Lithium Hydride

1960 ◽  
Vol 32 (3) ◽  
pp. 728-734 ◽  
Author(s):  
Thomas C. James ◽  
Wilfred G. Norris ◽  
William Klemperer
Keyword(s):  
Dipole Moment ◽  
Infrared Spectrum ◽  
Lithium Hydride ◽  
Moment Function

Induced dipole-moment function of HD

1989 ◽  
Vol 39 (16) ◽  
pp. 11378-11383 ◽  
Author(s):  
J. D. Poll ◽  
M. Attia ◽  
R. H. Tipping
Keyword(s):  
Dipole Moment ◽  
Moment Function ◽  
Induced Dipole

Far‐infrared spectrum of N2 and N2‐noble gas mixtures near 80 K

1996 ◽  
Vol 104 (10) ◽  
pp. 3511-3516 ◽  
Author(s):  
E. H. Wishnow ◽  
H. P. Gush ◽  
I. Ozier
Keyword(s):  
Infrared Spectrum ◽  
Noble Gas ◽  
Far Infrared ◽  
Gas Mixtures

Memory Effects in the Collision-Induced Spectra of Noble Gases in Liquid Argon

1971 ◽  
Vol 49 (22) ◽  
pp. 2870-2873 ◽  
Author(s):  
U. Buontempo ◽  
S. Cunsolo ◽  
G. Jacucci
Keyword(s):  
Dipole Moment ◽  
Dipole Moments ◽  
Low Frequency ◽  
Far Infrared ◽  
Liquid Argon ◽  
Low Frequencies ◽  
Line Shapes ◽  
Induced Dipole ◽  
Rapid Fall ◽  
The Difference

We have measured the far infrared absorption spectra of dilute solutions of helium and neon in liquid argon arising from collision-induced electric dipole moments. The two spectra consist of broad bands similar in shape peaked at 70 cm−1 (Ne–A) and 120 cm−1 (He–A). They are characterized by a long high-frequency tail and a rapid fall at low frequency. The reduced line shapes are compared taking into account the difference in the duration of the collision-induced dipole moment. At high frequencies the two curves are similar to those observed in the gas phase. Their departure from the gaseous spectra at low frequencies is attributed to a negative correlation of the dipole moment induced in successive repulsive interactions.

The Dipole Moment Derivative of the Hydrogen Bond in Ice

1972 ◽  
Vol 50 (3) ◽  
pp. 310-314 ◽  
Author(s):  
E. Whalley
Keyword(s):  
Hydrogen Bond ◽  
Dipole Moment ◽  
Infrared Spectrum ◽  
Effective Charge ◽  
Far Infrared ◽  
Quadrupole Moments ◽  
Charge Distributions ◽  
Hydrogen Bond Interactions ◽  
Integrated Intensity

The dipole moment derivative of the hydrogen bond in ice has been calculated assuming that the molecules can be represented as non-overlapping polarizable charge distributions characterized by dipole and quadrupole moments. The value is 0.1 electron charges which is about one third of the experimental value obtained from the far-infrared spectrum. The model predicts therefore only about one tenth of the experimental integrated intensity from which the effective charge was derived. Most of the intensity must therefore be due to specific hydrogen-bond interactions.

The far infrared spectrum of H2O2 observed and calculated rotational levels of the torsional states : (n, τ) = (0, 1), (0, 3) and (1, 1)

1988 ◽  
Vol 49 (11) ◽  
pp. 1901-1910 ◽  
Author(s):  
F. Masset ◽  
L. Lechuga-Fossat ◽  
J.-M. Flaud ◽  
C. Camy-Peyret ◽  
J.W.C. Johns ◽  
...  
Keyword(s):  
Infrared Spectrum ◽  
Far Infrared
Sign in / Sign up

Export Citation Format

Share Document