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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Published in | Spectrochimica acta. Part A: Molecular spectroscopy Vol. 49; no. 4; pp. 509 - 516 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier B.V
01.04.1993
Elsevier |
Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0584-8539 |
DOI: | 10.1016/0584-8539(93)80193-E |