Spectral analysis of Qinling Mountain rock using laser induced breakdown spectroscopy

The composition of Qinling Mountain rock is studied using laser induced breakdown spectroscopy for the first time. Elements Ca, Mg, Cu, Fe, C, Na, Si, Al, Ti, K and Mn are identified qualitatively. Using an improved iterative Boltzmann plot method, the electron temperature of 16,825 K is inferred wi...

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Bibliographic Details
Published inJournal of modern optics Vol. 60; no. 21; pp. 1905 - 1909
Main Authors Luo, W.F., Zhao, X.X., Zhu, H.Y., Xie, D.H., Liu, J., Jin, P.F.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 01.12.2013
Taylor & Francis Ltd
Subjects
Aluminum
atomic emission spectroscopy
Density
Electron temperature
Electrons
Laser induced breakdown
LIBS
Mountains
Optics
plasma
Rock
Spectra
Spectroscopy
Temperature effects
Thermodynamics
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Summary:The composition of Qinling Mountain rock is studied using laser induced breakdown spectroscopy for the first time. Elements Ca, Mg, Cu, Fe, C, Na, Si, Al, Ti, K and Mn are identified qualitatively. Using an improved iterative Boltzmann plot method, the electron temperature of 16,825 K is inferred with Ca I lines at 422.67, 428.30, 443.49, 445.48, and 585.74 nm, while the ionic temperature of 15,587 K is obtained with Ca II lines at 393.37, 396.85, and 370.60 nm. The electron number density of 1.49 10  cm is inferred from the Stark broadened profile of Ca I 422.67 nm averaged with 10 single spectra. The laser-induced rock plasma is verified to be in local thermodynamic equilibrium and to be optically thin based on the experimental results.
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content type line 23
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2013.865803