Vibrational excitation and dissociative attachment of a triatomic molecule: CO/sub 2/ in the collinear approximation

Journal Article · Sat Feb 01 00:00:00 EST 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.33.954· OSTI ID:6366775

Wong, C F; Light, J C

The effective R-matrix model and the R-matrix propagative method applied earlier to elec- tron--diatomic-molecule scattering are extended to treat dissociative attachment of collinear triatomic molecules. To describe the vibrational excitation and dissociative attachment of CO/sub 2/ in the 4-eV region, the nuclear dynamics is solved on a Wall-Porter potential-energy surface. A hybrid approach is developed in which the L/sup 2/ and R-matrix propagation methods are combined to evaluate the global R matrix. Our calculations show that it is easier to excite the symmetric mode vibrations than the asymmetric mode vibrations. Our results also show that the observed structures in the energy dependence of the dissociative attachment cross sections are due to the vibrational states of the negative ion (CO/sub 2/ /sup -/) and not to the vibrational states of the CO fragment.

• Research Organization: The James Franck Institute and The Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
• OSTI ID: 6366775
• Journal Information: Phys. Rev. A; (United States), Vol. 33:2
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON DIOXIDE
ELECTRON-MOLECULE COLLISIONS
ELECTRON ATTACHMENT
EXCITATION
ANIONS
CROSS SECTIONS
DISSOCIATION
ENERGY DEPENDENCE
R MATRIX
VIBRATIONAL STATES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
IONS
MATRICES
MOLECULE COLLISIONS
OXIDES
OXYGEN COMPOUNDS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena