Vibrational relaxation of CO/sup +/(A /sup 2/Pi/sub i/, v' = 1) and CO/sup +/(B /sup 2/. sigma. /sup +/, v' = 1) ions in the collision with CO molecules

Journal Article · Thu Dec 01 04:00:00 EST 1983 · J. Chem. Phys.; (United States)

OSTI ID:5667265

Ibuki, T; Sugita, N

The vibrationally selected CO/sup +/(A /sup 2/Pi/sub i/, v' = 0,1) and CO/sup +/(B /sup 2/..sigma../sup +/, v' = 0,1) ions were generated by the photoionization of CO using Ne and He resonance lamps, respectively. The quenching cross sections of the excited ions were found to be very large and exceed gas kinetic values in the B /sup 2/..sigma../sup +/ state. In both excited states it has been observed that the vibrationally excited v' = 1 ion relaxes to v' = 0 level through the collision with the parent CO molecules. The branching ratio of quenching to relaxation in the v' = 1 ions was explained by a cascading relaxation mechanism in which all the vibrational levels underlying the excited v' = 1 level contribute to the energy transfer.

• Research Organization: Institute for Chemical Research, Kyoto University, Uji Kyoto 611, Japan
• OSTI ID: 5667265
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 79:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
COLLISIONS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
MOLECULAR IONS
MOLECULE COLLISIONS
OXIDES
OXYGEN COMPOUNDS
RELAXATION
VIBRATIONAL STATES