Abstract
Improved spectral resolutions were achieved in laser-induced breakdown spectroscopy (LIBS) through generation of high-temperature and low-density plasmas. A first pulse from a KrF excimer laser was used to produce particles by perpendicularly irradiating targets in air. A second pulse from a 532 nm Nd:YAG laser was introduced parallel to the sample surface to reablate the particles. Optical scattering from the first-pulse plasmas was imaged to elucidate particle formation in the plasmas. Narrower line widths (full width at half maximums: FWHMs) and weaker self-absorption were observed from time-integrated LIBS spectra. Estimation of plasma temperatures and densities indicates that high temperature and low density can be achieved simultaneously in plasmas to improve LIBS resolutions.
Original language | English (US) |
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Pages (from-to) | 10997-11006 |
Number of pages | 10 |
Journal | Optics Express |
Volume | 19 |
Issue number | 11 |
DOIs | |
State | Published - May 23 2011 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics