Kinetic study of high-pressure Ar--H/sub 2/O mixtures excited by relativistic electrons

Journal Article · Mon Jun 01 04:00:00 EDT 1981 · J. Chem. Phys.; (United States)

OSTI ID:6405923

Leblond, J B; Collier, F; Hoffbeck, F; Cottin, P

Dissociation of the H/sub 2/O molecule by collisions with metastable argon (/sup 3/P/sub 2/) was shown a few years ago to lead to the excitation of the first vibrational levels of A /sup 2/S/sup +/ excited state of OH. The present work consists of a detailed kinetic study of an e-beam excited Ar--H/sub 2/O mixture to evaluate the potential interest of that reaction scheme for laser applications. In this study, we have mainly shown that OH* (A /sup 2/S/sup +/) is populated by an Ar/sup +/+H/sub 2/O pathway too and we give an estimate for the OH* (A /sup 2/S/sup +/) and OH (X /sup 2/R) formation branching ratios. We have also estimated that Ar(/sub 2/+H/sub 2/O is a minor OH* pathway. These results and measurements of main reaction rates permitted us to give a kinetic model where the predicted time dependence of population are in good agreement with the experimental result. The feasibility of a radical laser based on the collisional dissociation scheme of molecules is discussed.

• Research Organization: Laboratoires de Marcoussis, Centre de Recherches de la Compagnie Generale D'Electricite, Division Lasers, 91460 Marcoussis, France
• OSTI ID: 6405923
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 74:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
BEAMS
BINARY MIXTURES
COLLISIONS
DISPERSIONS
DISSOCIATION
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
EMISSION
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FEASIBILITY STUDIES
FLUIDS
GAS LASERS
GASES
HIGH PRESSURE
HYDROXYL RADICALS
IONIZATION
KINETICS
LASERS
LEPTON BEAMS
METASTABLE STATES
MIXTURES
MOLECULE COLLISIONS
NONMETALS
PARTICLE BEAMS
RADICALS
RARE GASES
RELATIVISTIC RANGE
STIMULATED EMISSION
VAPORS
WATER VAPOR