Abstract

We present analysis of superposition spectra following laser-induced breakdown (LIB) of methane. Both hydrogen-beta and hydrogen-gamma lines contain discernible contributions from diatomic carbon emissions for time delays of 1 to 2 μs from pulsed, 8 ns, infrared Nd:YAG laser radiation LIB. Analysis of the atomic lines and molecular C2 spectra reveal electron and molecular excitation temperatures of typically 13,000 and 5000 K, respectively.

©2012 Optical Society of America

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