Energy transfer between electronically excited argon and nitrogen: A kinetic model for the 3371 and the 3577 A laser emissions
Laser action of an argon--nitrogen mixture excited by an electron beam has been studied. Laser action at 3577 A, but also at 3371 A was observed. In observed kinetic models laser emission at 3371 A was forbidden. A new kinetic model is presented based on a total transfer reaction between Ar (4s) and N/sub 2/(C /sup 3/Pi/sub u/). The main feature of the model permits laser action at 3371 A only if the excitation time is short enough. The experiments performed with a small electron gun possessing the required characteristics (risetime=1 ns FWHM=10 ns) permitted laser emissions at 3371 and 3577 A to be observed. For strong cavity coupling the emission is more powerful on the 3371 line than on the 3577 A line. The same experiments made with an electron gun of a larger energy and a longer excitation pulse exhibits only a laser emission at 3577 A, in agreement with theoretical computations.
- Research Organization:
- Laboratoire de Physique des Plasmas,)/sup b/ Batiment 212, Universite Paris-Sud, Centre d'Orsay, 91405 Orsay, France
- OSTI ID:
- 7220844
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 67:6; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
BEAMS
BINARY MIXTURES
COLLISIONS
CRYOGENIC FLUIDS
DISPERSIONS
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELEMENTS
EMISSION
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GAS LASERS
KINETICS
LASERS
LEPTON BEAMS
MIXTURES
MOLECULE COLLISIONS
NITROGEN
NONMETALS
PARTICLE BEAMS
PERFORMANCE
POPULATION INVERSION
RADIATIONS
RARE GASES
STIMULATED EMISSION
ULTRAVIOLET RADIATION