Nascent rovibrational distribution of O/sup +//sub 2/(A /sup 2/Pi/sub u/) produced by He(2 /sup 3/S) Penning ionization of O/sub 2/
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:7087517
The He(2 /sup 3/S) Penning ionization of O/sub 2/ to give O/sup +//sub 2/(A /sup 2/Pi/sub u/) has been studied by observing the O/sup +//sub 2/(A /sup 2/Pi/sub u/--X /sup 2/Pi/sub g/) emission in beam and flowing afterglow apparatus. A comparison of beam and flowing afterglow data indicates that the nascent rovibrational distribution is lost in the flowing afterglow due to collisional relaxation. The nascent vibrational distribution of O/sup +//sub 2/(A /sup 2/Pi/sub u/) shifts to lower vibrational levels in comparison with the Franck--Condon factors for vertical O/sub 2/(X)..-->..O/sup +//sub 2/(A) ionization. The rotational temperature decreases from 4200 K for v' = 0 to 400 K for v' = 13. Vibrational relaxation of O/sup +//sub 2/(A) accompanied by a significant rotational excitation is explained as a result of a short-range repulsive interaction (He--O/sup +//sub 2/(A)..-->..He+O/sup +//sub 2/(A)) in the exit channel.
- Research Organization:
- Institute of Advanced Material Study and Department of Molecular Science and Technology, Graduate School of Engineering Sciences, Kyushu University, Kasuga-shi, Fukuoka, 816 Japan
- OSTI ID:
- 7087517
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 89:11; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
CO/sup +//sub 2/(A--X and B--X) emissions resulting from the He(2 /sup 3/S)+CO/sub 2/ Penning ionization
Rotationally resolved pulsed field ionization photoelectron bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) in the energy range of 16.0-18.0 eV
Rotationally resolved pulsed-field ionization photoelectron bands for O{sub 2}{sup +}(A {sup 2}{pi}{sub u},v{sup +}=0-12) in the energy range of 17.0-18.2 eV
Journal Article
·
Fri Oct 15 00:00:00 EDT 1982
· J. Chem. Phys.; (United States)
·
OSTI ID:7040020
Rotationally resolved pulsed field ionization photoelectron bands for O{sub 2}{sup +}(a {sup 4}{pi}{sub u}, v{sup +}=0-18) in the energy range of 16.0-18.0 eV
Journal Article
·
Fri Jan 14 23:00:00 EST 2000
· Journal of Chemical Physics
·
OSTI ID:20215054
Rotationally resolved pulsed-field ionization photoelectron bands for O{sub 2}{sup +}(A {sup 2}{pi}{sub u},v{sup +}=0-12) in the energy range of 17.0-18.2 eV
Journal Article
·
Fri Jan 14 23:00:00 EST 2000
· Journal of Chemical Physics
·
OSTI ID:20215053
Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AFTERGLOW
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
ATOMIC BEAMS
BEAMS
CHARGED PARTICLES
CHEMICAL REACTION YIELD
COLLISIONS
DISTRIBUTION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
HELIUM
IONIZATION
IONS
METASTABLE STATES
MOLECULE COLLISIONS
NONMETALS
OXYGEN
OXYGEN IONS
PENNING EFFECT
RARE GASES
RELAXATION
ROTATIONAL STATES
VIBRATIONAL STATES
YIELDS
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AFTERGLOW
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
ATOMIC BEAMS
BEAMS
CHARGED PARTICLES
CHEMICAL REACTION YIELD
COLLISIONS
DISTRIBUTION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
HELIUM
IONIZATION
IONS
METASTABLE STATES
MOLECULE COLLISIONS
NONMETALS
OXYGEN
OXYGEN IONS
PENNING EFFECT
RARE GASES
RELAXATION
ROTATIONAL STATES
VIBRATIONAL STATES
YIELDS