Laser-induced breakdown spectroscopy: investigation of Pb resonant excitation and decay paths

Stéphane Laville; François Vidal; Mohamed Chaker; Mohamad Sabsabi

doi:10.1117/12.707919

8 September 2006 Laser-induced breakdown spectroscopy: investigation of Pb resonant excitation and decay paths

Stéphane Laville, François Vidal, Mohamed Chaker, Mohamad Sabsabi

Proceedings Volume 6343, Photonics North 2006; 634321 (2006) https://doi.org/10.1117/12.707919
Event: Photonics North 2006, 2006, Quebec City, Canada

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 2^nd pulse provided by an Optical Parametric Oscillator (OPO) laser was launched several μs afterwards.

Citation Download Citation

Stéphane Laville, François Vidal, Mohamed Chaker, and Mohamad Sabsabi "Laser-induced breakdown spectroscopy: investigation of Pb resonant excitation and decay paths", Proc. SPIE 6343, Photonics North 2006, 634321 (8 September 2006); https://doi.org/10.1117/12.707919

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