Resumo

VERA-LONDONO, Liliana Patricia; PEREZ-TABORDA, Jaime Andrés  e  RIASCOS-LANDAZURI, Henry. Spectroscopic analysis of coal plasma emission produced by laser ablation. Rev.fac.ing.univ. Antioquia [online]. 2016, n.78, pp.69-72. ISSN 0120-6230.  https://doi.org/10.17533/udea.redin.n78a09.

An analysis of plasma produced by laser ablation using 1,064 nm of laser radiation from a Q-switched Nd:YAG on coal mineral samples under air ambient, was performed. The emission of molecular band systems such as C₂ Swan System , the First Negative System N₂ (Band head at 501.53 nm) and different emission lines were investigated using the optical emission spectroscopy technique. The C₂ molecular spectra (Swan band) were analyzed to determine vibrational temperature (0.62 eV). The density and electron temperature of the plasma have been evaluated using Stark broadening and the intensity of the nitrogen emission lines (N II). Values of 1.2 eV of electron temperature and 1.82×10¹⁹ cm^-3 of electron density were found.

Palavras-chave : Laser ablation; Laser Induced Plasma Spectroscopy (LIPS); Optical Emission Spectroscopy (EOS); coal.

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