Study of CN emission from a laser induced plasma of graphite in air |
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| Institution: | 1. Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK;2. National Nuclear Laboratory, Central Laboratory, Sellafield, Seascale, Cumbria CA20 1PG, UK |
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| Abstract: | 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 B2Σ-X2Σ. In the range from 1 to 20 μs the population of B2Σ rovibrational levels can be described by a temperature of about 8500 K. |
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