Unexpected temporal evolution of atomic spectral lines of aluminum in a laser induced breakdown spectroscopy experiment
L'HERMITE, Daniel
Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire [LANIE]
Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire [LANIE]
L'HERMITE, Daniel
Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire [LANIE]
< Reduce
Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire [LANIE]
Language
en
Article de revue
This item was published in
Spectrochimica Acta Part B: Atomic Spectroscopy. 2014-11-01, vol. 101, p. 330-334
Elsevier
English Abstract
The temporal evolution of the laser induced breakdown (LIBS) signal of a pure aluminum sample was studied under nitrogen and air atmospheres. In addition to the usual decrease of signal due to plasma cooling, unexpected ...Read more >
The temporal evolution of the laser induced breakdown (LIBS) signal of a pure aluminum sample was studied under nitrogen and air atmospheres. In addition to the usual decrease of signal due to plasma cooling, unexpected temporal evolutions were observed for a spectral lines of aluminum, which revealed the existence of collisional energy transfer effects. Furthermore, molecular bands of AlN and AlO were observed in the LIBS spectra, indicating recombination of aluminum with the ambient gas. Within the experimental conditions reported in this study, both collisional energy transfer and recombination processes occurred around 1.5 μs after the laser shot. This highlights the possible influence of collisional and chemical effects inside the plasma that can play a role on LIBS signals.Read less <
English Keywords
LIBS LASER-INDUCED BREAKDOWN SPECTROSCOPY
Molecular recombination
Collisional energy transfert
Plasma temperature
Temporal evolution
Origin
Hal imported