Collison-induced rototranslational absorption spectra of H/sub 2/-He pairs at temperatures from 40 to 3000 K
The zeroth, first, and second spectral moments of the rototranslational collision-induced absorption (RT CIA) spectra of hydrogen-helium mixtures are calculated from the fundamental theory, for temperatures from 40 to 3000 K. With the help of simple analytical functions of three parameters and the information given, the RT CIA spectra of H/sub 2/-He pairs can be generated on computers of small capacity, with rms deviations from exact quantum profiles of not more than a few percent. Such representations of the CIA spectra are of interest for work related to the atmospheres of the outer planets and cool stars. The theoretical spectra are in close agreement with existing laboratory measurements at various temperatures from about 77 to 3000 K. 28 references.
- Research Organization:
- Texas Univ., Austin (USA); NBS, Gaithersburg, MD (USA)
- OSTI ID:
- 7222312
- Journal Information:
- Astrophys. J.; (United States), Vol. 326
- Country of Publication:
- United States
- Language:
- English
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
HELIUM
ABSORPTION SPECTRA
HYDROGEN
PLANETARY ATMOSPHERES
SPECTROSCOPY
FAR INFRARED RADIATION
HIGH TEMPERATURE
MIXTURES
ATMOSPHERES
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
GASES
INFRARED RADIATION
NONMETALS
RADIATIONS
RARE GASES
SPECTRA
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory
640107 - Astrophysics & Cosmology- Planetary Phenomena