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

1965 ◽  
Vol 43 (5) ◽  
pp. 751-769 ◽  
Author(s):  
D. R. Bosomworth ◽  
H. P. Gush
Keyword(s):  
Infrared Spectra ◽  
Room Temperature ◽  
Broad Band ◽  
Far Infrared ◽  
Gas Mixtures ◽  
Frequency Region ◽  
Rare Gas ◽  
Induced Absorption ◽  
Far Infrared Spectra ◽  
Zero Frequency

The induced spectra of compressed helium–argon and neon–argon mixtures, and of compressed hydrogen, nitrogen, and oxygen have been measured in the frequency region 20 to 400 cm−1. The far-infrared spectra consist of a translational branch and a rotational branch which overlap, except in the rare-gas mixtures where only the translational component exists. The latter is a broad band which extends from zero frequency to about 500 cm−1, with a maximum near 150 cm−1 in the room-temperature gas. In the case of hydrogen the translational branch is readily distinguished from the rotational branch because it lies at a lower frequency than the latter. In the case of oxygen and nitrogen the spacing between the rotational lines is small and the translational and rotational branches overlap completely.

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.

Luminescence Spectra of Trans-Bis(N-Alkyliminodiacetato)- Chromate(III) Complexes

1979 ◽  
Vol 34 (9) ◽  
pp. 1099-1105
Author(s):  
Rainer Wernicke ◽  
Hans-Herbert Schmidtke ◽  
Patrick E. Hoggard
Keyword(s):  
Infrared Spectra ◽  
Room Temperature ◽  
Far Infrared ◽  
Vibronic Spectrum ◽  
Tetragonal Symmetry ◽  
Luminescence Spectra ◽  
Intensity Maximum ◽  
Zero Phonon Line ◽  
Phonon Line ◽  
Far Infrared Spectra

Abstract Luminescence spectra at 85 K have been recorded for a series of chromium (III) complexes with alkyliminodiacetates (RIDA) of the form K[Cr(RIDA)2], R=M(methyl), E(ethyl), n-P(n-propyl), i-P(isopropyl), n-B-(n-butyl), and t-B (t-butyl). Infrared and far infrared spectra of room temperature samples were also recorded. All of the RIDA complexes exhibited the vibronic spectrum, with a remarkable shift of the intensity maximum away from the zero phonon line, which is characteristic of trans geometry in these complexes pointing to a 2E (tetragonal symmetry label) luminescent state. A comparison of vibronic intervals with IR data suggests several bands which may be indicative of iminodiacetate coordination.

Far-infrared collision-induced absorption in rare gas mixtures: Quantum and semi-classical calculations

2014 ◽  
Vol 140 (15) ◽  
pp. 154302 ◽  
Author(s):  
Ilya Buryak ◽  
Lothar Frommhold ◽  
Andrey A. Vigasin
Keyword(s):  
Far Infrared ◽  
Gas Mixtures ◽  
Rare Gas ◽  
Induced Absorption

Mid‐ and Far‐Infrared Spectra of HF and DF in Rare‐Gas Matrices

1971 ◽  
Vol 54 (8) ◽  
pp. 3491-3499 ◽  
Author(s):  
M. G. Mason ◽  
W. G. Von Holle ◽  
D. W. Robinson
Keyword(s):  
Infrared Spectra ◽  
Far Infrared ◽  
Rare Gas ◽  
Far Infrared Spectra

Glass transition temperatures, density and conductivity data, and far-infrared spectra of fused zinc chloride + β-aminoethanol hydrochloride mixtures

1973 ◽  
Vol 26 (7) ◽  
pp. 1453
Author(s):  
AJ Easteal ◽  
CB Kelly
Keyword(s):  
Glass Transition ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Composition Range ◽  
Far Infrared ◽  
Thermal Expansivity ◽  
Glass Transition Temperatures ◽  
Glass Forming ◽  
Liquid Samples ◽  
Far Infrared Spectra

Densities and conductivities of fused ZnCl2 + β-aminoethanol hydrochloride mixtures containing up to c. 72 mole % ZnCl2 are reported for the temperature range from 293 K (approximately) to 393 K. Molar volume isotherms are almost linear throughout the composition range, while thermal expansivity isotherms have minima in the vicinity of 8 mole % ZnCl2 and maxima at about 25 mole % ZnCl2. ��� Mixtures are glass-forming from c. 11 mole % ZnCl2 to at least 72.5 mole % ZnCl2. The glass transition temperature is almost invariant from 11 to 25 mole % ZnCl2, and increases linearly from 30 mole % ZnCl2. ��� Infrared spectra (500-200cm-1) of liquid samples supercooled to room temperature, are reported for mixtures containing 20,26, 33, 63, and 77 mole % ZnCl2.

Sign in / Sign up

Export Citation Format

Share Document