Spatial and Temporal Dependence of Lead Emission in Laser-Induced Breakdown Spectroscopy

Abstract

Two-dimensional images of the distribution in space and time of the chemical species associated with the spectral emission from a laser-induced breakdown (LIB) plasma on a solid sample were captured. The time-dependent spatial shape and size of the plasma, viewed simultaneously from two orthogonal directions, were measured in terms of the emission from a lead ionic line and a set of lead atomic lines. The temporal and spatial behavior are characteristically different for the different spectral lines. The ionic emission (220 nm) is confined to a smaller, more concentrated central part of the LIB plasma, whereas the atomic emission (280 nm) is more evenly dispersed over the entire plasma. A protrusion of the plasma was observed where there was no significant emission at 220 or 280 nm. Time-resolved spectral imaging has the potential to considerably improve analytical LIB spectroscopy (LIBS) results and lead to a better fundamental understanding of its behavior.

Characterization of Laser-Induced Breakdown Spectroscopy (LIBS) for Application to Space Exploration

“…Recent work has investigated the form ation and evolution of the laser plasma formed on a solid in air at atmospheric pressure by using time-resolved imaging. 20,21 In addition, in a series of papers, Kagawa and co-workers 22±24 discussed mechanisms operative in plasmas at pressures down to 10 torr. As this work shows, there are signi® cant visual changes in plasma characteristics as the pressure is decreased.…”

Emerging technologies for the non-invasive characterization of physical-mechanical properties of tablets

“…An advancement of LIBS described as 'Time-Resolved Laser Induced Breakdown Spectroscopy' (TRELIBS) allows monitoring the emitted waves against nanoseconds time resolution. TRELIBS facilitates the selection of the optimum sampling time for better data acquisition from the plasma (Castle et al, 1997;Radziemski et al, 1983). Modern detectors, consisting of intensified charge coupled devices (ICCD) arranged in series, provide data with a high resolution.…”

Laser Ablation Mass Spectrometry of Actinide Dioxides: ThO2, UO2, NpO2, PuO2 and AmO2

“…Altematively, excited neutral atoms and ions in the TCP plasma can be detected by emission spectroscopy (ICP-AES). A non-conventional vaporization method for ICP techniques is by laser ablation of solid samples [1], and the necessity for ICP excitation prior to AES detection of atoms can be circumvented using laser induced breakdown spectroscopy (LIBS) [9] where the emission from the ablation plume itself is measured directly. In analogy, the ICP ionization step of ICP-MS is eliminated in direct samphng laser ablation mass spectrometry (LA-MS).…”