Study of CN emission from a laser induced plasma of graphite in air

Emission of neutral N atoms and CN molecules has been studied in the plasma produced by focusing a 200 mJ Nd: YAG laser onto a graphite target in air. Emission of atomic fines appears at early times. The Stark broadening of these lines is strongly time dependent due to the evolution of electron dens...

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Bibliographic Details
Published inSpectrochimica acta. Part A: Molecular spectroscopy Vol. 49; no. 4; pp. 509 - 516
Main Authors Hatem, G., Colón, C., Campos, J.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier B.V 01.04.1993
Elsevier
Subjects
Atomic and molecular physics
Exact sciences and technology
Infrared spectra
Molecular properties and interactions with photons
Molecular spectra
Physics
Matrix isolation
Diatomic molecule
Plasma
Laser pulse
Very high temperature
YAG laser
Nitrogen Carbon Molecules
Electron density
Experimental study
Nitrogen Atoms
Emission spectrum
Inorganic compound
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Summary:Emission of neutral N atoms and CN molecules has been studied in the plasma produced by focusing a 200 mJ Nd: YAG laser onto a graphite target in air. Emission of atomic fines appears at early times. The Stark broadening of these lines is strongly time dependent due to the evolution of electron density in the plasma. At later times the spectrum is dominated by the CN violet system B 2Σ- X 2Σ. In the range from 1 to 20 μs the population of B 2Σ rovibrational levels can be described by a temperature of about 8500 K.
ISSN:0584-8539
DOI:10.1016/0584-8539(93)80193-E