Symmetries, propensity rules, and alternation intensity in the rotational spectrum of N/sub 2/ (C /sup 3/Pi/sub u/) excited by metastables Ar(/sup 3/P/sub 0,2/)
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:5338115
We have obtained high resolution spectra N/sub 2/(C /sup 3/Pi/sub u/..-->..B /sup 3/Pi/sub g/) afterglow fluorescence resulting from excitation transfer from state selected Ar metastable /sup 3/P/sub 0/ or /sup 3/P/sub 2/. This was achieved by selective depopulation of one metastable by optical pumping using a tunable c.w. dye laser. Relative probabilities of excitation of well defined rotational, spin, and parity molecular ..lambda.. doublet substates were obtained for reaction of /sup 14/N/sub 2/ and isotopic /sup 15/N/sub 2/ with Ar*(/sup 3/P/sub 2/) and Ar*(/sup 3/P/sub 0/). A semiclassical model is proposed and found in fairly good agreement with the observed relative yields. The physical bases of the model are justified and imply that (a) spin--orbit interactions are effective during the collision, (b) the plane of rotation of the excited N/sub 2/ molecule is a plane of symmetry, (c) ..lambda.. doublet c states are preferentially populated in the excitation transfer process.
- Research Organization:
- Laboratoire de Spectrometrie Physique, Universite Scientifique et Medicale de Grenoble, B. P. 53 X - 38041 Grenoble Cedex-France
- OSTI ID:
- 5338115
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 72:12; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ar(/sup 3/P/sub 2/) -N/sub 2/(C /sup 3/Pi/sub u/) excitation transfer cross section and radiative lifetimes of the nitrogen-molecular-laser transitions
Kinetic study of e-beam excited Ar--CO/sub 2/ mixture
Collision energy dependence of the cross sections for the dissociative excitation reactions: Rg(/sup 3/P/sub 0,2/) +NH/sub 3/. -->. Rg+NH(A /sup 3/Pi, c /sup 1/Pi)+H/sub 2/ (Rg = Ar, Kr)
Journal Article
·
Thu Nov 30 23:00:00 EST 1978
· Phys. Rev., A; (United States)
·
OSTI ID:6587564
Kinetic study of e-beam excited Ar--CO/sub 2/ mixture
Journal Article
·
Fri Feb 29 23:00:00 EST 1980
· J. Chem. Phys.; (United States)
·
OSTI ID:5484732
Collision energy dependence of the cross sections for the dissociative excitation reactions: Rg(/sup 3/P/sub 0,2/) +NH/sub 3/. -->. Rg+NH(A /sup 3/Pi, c /sup 1/Pi)+H/sub 2/ (Rg = Ar, Kr)
Journal Article
·
Thu May 01 00:00:00 EDT 1986
· J. Chem. Phys.; (United States)
·
OSTI ID:5974060
Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
FLUORESCENCE
LUMINESCENCE
METASTABLE STATES
MOLECULE COLLISIONS
NITROGEN
NONMETALS
RARE GASES
ROTATIONAL STATES
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
FLUORESCENCE
LUMINESCENCE
METASTABLE STATES
MOLECULE COLLISIONS
NITROGEN
NONMETALS
RARE GASES
ROTATIONAL STATES