Abstract
Accurate measurements of collision-induced absorption in CO2 are made at a number of temperatures in the range from − 40 to 60°C in the wavelength region 7–250 cm−1. Direct evidence for the separation of the pure translational band from the rotational–translational band is obtained at all temperatures. This and other aspects of the band shape are discussed. Over the entire temperature range, the experimentally determined Kramers–Kronig integral is found to be in good agreement with the theoretical value, i.e., the static dielectric constant. This agreement is achieved only when the contribution of the quadrupole–quadrupole energy in the radial distribution function, of particular importance for CO2 because of its large quadrupole moment, is calculated accurately. A value of the quadrupole moment is obtained, (4.5 ± 0.2)10−26 esu, which is in satisfactory agreement with that obtained by the method of Buckingham and Disch, which does not depend on a knowledge of intermolecular force constants. Induction due to higher multipole moments and the overlap interaction is considered.
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Dates
Type | When |
---|---|
Created | 21 years, 7 months ago (Feb. 4, 2004, 5:07 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 9, 2024, 3:53 a.m.) |
Indexed | 1 year ago (Sept. 3, 2024, 3:27 a.m.) |
Issued | 54 years, 1 month ago (Aug. 1, 1971) |
Published | 54 years, 1 month ago (Aug. 1, 1971) |
Published Print | 54 years, 1 month ago (Aug. 1, 1971) |
@article{Ho_1971, title={Far-Infrared Collision-Induced Absorption in CO2. I. Temperature Dependence}, volume={55}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1676181}, DOI={10.1063/1.1676181}, number={3}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Ho, W. and Birnbaum, G. and Rosenberg, A.}, year={1971}, month=aug, pages={1028–1038} }