Collision-induced absorption by H sub 2 -He pairs in the fundamental band: Rotational states dependence

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.41.264· OSTI ID:6982115

Borysow, A ^[1]; Frommhold, L ^[2]; Meyer, W ^[3]

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1. Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309-0440 (USA)
2. Physics Department, University of Texas at Austin, Texas 78712-1081 (USA)
3. Fachbereich Chemie, Universitaet Kaiserslautern, Kaiserslautern (Federal Republic of Germany)

Previously, we have computed the induced-dipole-moment surface of collisional H{sub 2}-He complexes from first principles using highly correlated wave functions. These data were used to calculate the collision-induced absorption spectrum of the fundamental band (L. Frommhold and W. Meyer, Phys. Rev. A 35, 632 (1987)). The present study examines the dependence of radial induced-dipole transition moments and the associated spectra on the rotational states involved, a dependence that was suppressed in the previous study. Whereas the neglect of the rotational quantum numbers {ital j},{ital j}{prime} of the initial and final state of H{sub 2} is justified for the purely rototranslational spectra of H{sub 2}-He, we find significant variations with {ital j},{ital j}{prime} of the radial induced-dipole transition elements and the induced spectra for the fundamental band of H{sub 2}. Similar effects are expected for other molecular bands and systems of interest, especially those involving hydrogen molecules.

• OSTI ID: 6982115
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 41:1; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
BOUND STATE
COLLISIONS
CORRELATIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FAR INFRARED RADIATION
FLUIDS
GASES
HELIUM
HYDROGEN
INFRARED RADIATION
MOLECULE COLLISIONS
NONMETALS
RADIATIONS
RARE GASES
ROTATIONAL STATES
SPECTRA
TRANSIENTS