A crossed-beam study of the state-resolved integral cross sections for the inelastic scattering of OH( X sup 2. Pi. ) with CO and N sub 2

Journal Article · Wed May 15 00:00:00 EDT 1991 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.460279· OSTI ID:5467196

Sonnenfroh, D M; Macdonald, R G; Liu, K ^[1]

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1. Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (USA)

State-resolved cross sections for the inelastic scattering of OH({ital X} {sup 2}{Pi}) with CO and N{sub 2} have been measured in a crossed molecular beam apparatus over the energy range from 0.5 to 5.5 kcal mol{sup {minus}1}. The magnitude and shape of the excitation functions for the same OH final states were virtually independent of the two targets except near threshold. Both spin--orbit conserving and spin--orbit changing transitions have been investigated. Cross sections for spin--orbit changing transitions of large {Delta}{ital N} were approximately the same magnitude as those for spin--orbit conserving transitions. For small {Delta}{ital N}, however, the spin--orbit conserving transitions became more favorable. The {Lambda}-doublet ratio, {Pi}({ital A}{prime})/{Pi}({ital A}{double prime}), in the {Pi}{sub 3/2} ({ital F}{sub 1}) manifold differed from unity only for the N{sub 2} target for which the ratio became increasingly larger than unity as {ital N}{prime} increased. The observed fine-structure effects were nearly the same as those from the corresponding (reverse) reactive collisions, and a close connection between the inelastic and reactive events has been conjectured.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5467196
• Journal Information: Journal of Chemical Physics; (USA), Vol. 94:10; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON MONOXIDE
MOLECULE-MOLECULE COLLISIONS
HYDROXYL RADICALS
NITROGEN
ENERGY-LEVEL TRANSITIONS
EXCITATION FUNCTIONS
FINE STRUCTURE
INELASTIC SCATTERING
INTEGRAL CROSS SECTIONS
L-S COUPLING
MOLECULAR BEAMS
BEAMS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
COUPLING
CROSS SECTIONS
ELEMENTS
FUNCTIONS
INTERMEDIATE COUPLING
MOLECULE COLLISIONS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADICALS
SCATTERING
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena