Reaction dynamics from orbital alignment dependence and angular distributions of ions produced in collision of Ba( sup 1 P ) with NO sub 2 and O sub 3

Journal Article · Sat Feb 15 00:00:00 EST 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.462026· OSTI ID:5021873

Suits, A G; Hou, H; Davis, H F; Lee, Y T ^[1]

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

Angular distributions, orbital alignment dependence, and energy dependence of the relative cross sections of various ions produced in crossed beams collisions of electronically excited barium with O{sub 3} and NO{sub 2} were used to explore the dynamics of these reactions. The Ba{sup +} product from both reactions showed strong dependence on alignment of the Ba({sup 1}{ital P}) {ital p} orbital with respect to the relative velocity vector. The Ba{sup +} was generally forward or forward-sideways scattered, with the latter favored by the dominant perpendicular orbital alignment. Similar results for Ba{sup +} from both O{sub 3} and NO{sub 2} suggest that electron transfer is favored for large impact parameter collisions in which the Ba {ital p} orbital is directed toward the molecule at the critical configuration, regardless of the symmetry of the available orbital in the isolated molecule. BaO{sup +}{sub 2} from the O{sub 3} reaction exhibited angular distributions and energy dependences which were reminiscent of the Ba{sup +}, albeit 2 orders of magnitude lower in intensity, indicating a close relationship between these two channels. Important differences in the dynamics for the BaO{sup +} channel were suggested in the angular distributions, which show a substantial backscattered component, as well as the alignment effects and energy dependence. These indicate that the BaO{sup +} probably derives from neutral BaO* which is sufficiently internally excited to undergo vibrational autoionization.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5021873
• Journal Information: Journal of Chemical Physics; (United States), Vol. 96:4; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BARIUM
CHEMICAL REACTION KINETICS
BARIUM IONS
PRODUCTION
NITROGEN DIOXIDE
OXYGEN
ALIGNMENT
ANGULAR DISTRIBUTION
ATOM-MOLECULE COLLISIONS
AUTOIONIZATION
CATIONS
COLLIDING BEAMS
CONFIGURATION
CROSS SECTIONS
ELECTRON EXCHANGE
ENERGY DEPENDENCE
EXCITED STATES
IONS
MOLECULAR BEAMS
SYMMETRY
VECTORS
VELOCITY
VIBRATIONAL STATES
ALKALINE EARTH METALS
ATOM COLLISIONS
BEAMS
CHALCOGENIDES
CHARGED PARTICLES
COLLISIONS
DISTRIBUTION
ELECTRON TRANSFER
ELEMENTS
ENERGY LEVELS
IONIZATION
KINETICS
METALS
MOLECULE COLLISIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
TENSORS
400201* - Chemical & Physicochemical Properties