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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 25, Number 5
BKCSDE 25(5)
May 20, 2004 

Optical Emission Studies of a Plume Produced by Laser Ablation of a Graphite Target in a Nitrogen Atmosphere
Hye Sun Park, Sang Hwan Nam, Seung Min Park*
Laser ablation, Optical emission spectroscopy
Optical emission studies were performed to investigate thermal and dynamical properties of a plume produced by laser ablation of a graphite target in a nitrogen atmosphere. Experimental spectra of C2 (d3Πg → a3Πu, ?v = 1) and CN (B2Σ+ → X2Σ+, ?v = 0) were simulated to obtain the vibrational and rotational temperatures of the electronically excited species at various laser fluences and distances from the target. The spectroscopic temperatures of both molecules were found to be nearly independent of the laser fluence. The temperature of CN molecules was peaked in the middle of the plume while that of C2 decreased with increase in the distance. At a given distance, the temperature of CN molecules was clearly higher than that of C2.
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