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Proceedings Paper

Laser-induced breakdown spectroscopy: investigation of Pb resonant excitation and decay paths
Author(s): Stéphane Laville; François Vidal; Mohamed Chaker; Mohamad Sabsabi
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Paper Abstract

A promising way of improving the sensitivity of the LIBS (Laser-Induced Breakdown Spectroscopy) technique consists in using basically two successive laser pulses instead of only one as in conventional LIBS: the first pulse generates the plasma and the second pulse selectively excites a specific quantum level of a given trace atomic species inside the plasma. The effect of this second laser pulse is to increase the emission of the atomic species of interest and therefore enhance the signal-to-noise ratio, leading to an improved detection. As a first step toward the detection of Pb in various materials, we present in this work a study of the resonant excitation and decay paths of Pb atoms in a laser-produced plasma. The ablation was performed using a Nd:YAG laser and the 2nd pulse provided by an Optical Parametric Oscillator (OPO) laser was launched several μs afterwards.

Paper Details

Date Published: 8 September 2006
PDF: 8 pages
Proc. SPIE 6343, Photonics North 2006, 634321 (8 September 2006); doi: 10.1117/12.707919
Show Author Affiliations
Stéphane Laville, Institut National de la Recherche Scientifique (Canada)
National Research Council Canada (Canada)
François Vidal, Institut National de la Recherche Scientifique (Canada)
Mohamed Chaker, Institut National de la Recherche Scientifique (Canada)
Mohamad Sabsabi, National Research Council Canada (Canada)

Published in SPIE Proceedings Vol. 6343:
Photonics North 2006
Pierre Mathieu, Editor(s)

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