Reorientation cross sections in collisions of He([sup 1][ital S])+H[sub 2]([ital B] [sup 1][Sigma][sub [ital u]][sup +])

Journal Article · Sun Aug 15 04:00:00 EDT 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.465225· OSTI ID:6325513

Odutola, J A; Lester, Jr, W A ^[1]; Grimes, R M ^[2]

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1. Chemical Sciences Division, Lawrence Berkeley Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720 (United States)
2. Texas Instruments, Stafford, Texas 77477 (United States)

Reorientation cross sections have been computed for the He([sup 1][ital S])+H[sub 2]([ital B] [sup 1][Sigma][sub [ital u]][sup +]) system using a potential energy surface and model previously introduced for rovibrational energy transfer. The model consists of restricting the scattering solely to the excited state potential energy surface and the use of the coupled-channel method. The calculated reorientation cross section is 41.6 A[sup 2] for the transition ([ital vjm][sub [ital j]][equivalent to]0,1,0 [r arrow] [ital v][prime][ital j][prime][ital m][sup [prime]][sub [ital j]][equivalent to]0,1, [plus minus] 1) at room temperature; the corresponding Boltzmann average is 39.2 A[sup 2]. The latter result is in very good agreement with a recent measurement by Pibel and Moore of 29.7[plus minus]7.4 A[sup 2] [J. Chem. Phys. [bold 93], 4804 (1990)].

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6325513
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 99:4; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
ELEMENTS
ENERGY
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUIDS
GASES
HELIUM
HYDROGEN
MOLECULE COLLISIONS
NONMETALS
POTENTIAL ENERGY
RARE GASES
ROTATIONAL STATES
VIBRATIONAL STATES