Information on Intermolecular Potentials Obtained from the Temperature Dependence of the ir Absorption Spectrum of Rare Gas Mixtures

1972 ◽  
Vol 57 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Ezra Bar‐Ziv (Bazini) ◽  
Shmuel Weiss
Keyword(s):  
Absorption Spectrum ◽  
Temperature Dependence ◽  
Gas Mixtures ◽  
Rare Gas ◽  
Ir Absorption ◽  
Intermolecular Potentials

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 the vibrational phase relaxation in gases: Application to H2-rare gas mixtures

1985 ◽  
Vol 99 (2) ◽  
pp. 303-315 ◽  
Author(s):  
D. Robert ◽  
J. Bonamy ◽  
J.P. Sala ◽  
G. Levi ◽  
F. Marsault-Herail
Keyword(s):  
Temperature Dependence ◽  
Gas Mixtures ◽  
Rare Gas ◽  
Phase Relaxation

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.

The homogeneous Lorentzian IR absorption spectrum of (CF3)3CI at twice the threshold vibrational energy

1988 ◽  
Vol 146 (6) ◽  
pp. 599-604 ◽  
Author(s):  
V.N. Bagratashvili ◽  
S.I. Ionov ◽  
A.A. Stuchebrukhov ◽  
V.S. Letokhov ◽  
V.N. Lokhman ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Vibrational Energy ◽  
Ir Absorption

Vibrational relaxation of BF3 in the range 182–473 K and in rare-gas mixtures at 295 K

1977 ◽  
Vol 52 (2) ◽  
pp. 219-223 ◽  
Author(s):  
R. Kadibelban ◽  
W. Janiesch ◽  
R. Ahrens-Botzong ◽  
P. Hess
Keyword(s):  
Vibrational Relaxation ◽  
Gas Mixtures ◽  
Rare Gas

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 411-413
Author(s):  
Yixing Zhao ◽  
Gordon R Freeman
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Temperature Dependence ◽  
Optical Absorption Spectrum ◽  
Infrared Light ◽  
Solvated Electron ◽  
Solvated Electrons ◽  
Tert Butanol ◽  
Solvent Dependence ◽  
Increasing Temperature

The energy and asymmetry of the optical absorption spectrum of solvated electrons, es- , change in a nonlinear fashion on changing the solvent through the series HOH, CH3OH, CH3CH3OH, (CH3)2CHOH, (CH3)3COH. The ultimate, quantum-statistical mechanical, interpretation of solvated electron spectra is needed to describe the solvent dependence. The previously reported optical spectrum of es- in tert-butanol was somewhat inaccurate, due to a small amount of water in the alcohol and to limitations of the infrared light detector. The present note records the remeasured spectrum and its temperature dependence. The value of the energy at the absorption maximum (EAmax) is 155 zJ (0.97 eV) at 299 K and 112 zJ (0.70 eV) at 338 K; the corresponding values of G epsilon max (10-22 m2 aJ-1) are 1.06 and 0.74. These unusually large changes are attributed to the abnormally rapid decrease of dielectric permittivity of tert-butanol with increasing temperature. The band asymmetry at 299 K is Wb/Wr = 1.8.Key words: optical absorption spectrum, solvated electron, solvent effects, tert-butanol, temperature dependence.

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