Fornarini L, Spizzichino V, Colao F, Fantoni R, Lazic V
ENEA Frascati, FIS-LAS, Via E. Fermi 45, I-00044, Frascati, (Roma), Italy.
Anal Bioanal Chem. 2006 May;385(2):272-80. doi: 10.1007/s00216-006-0300-1. Epub 2006 Apr 19.
In this work the influence of laser wavelength upon the analytical results obtained from applying LIBS diagnostics to bronzes was investigated theoretically and experimentally at 1,064 nm and 355 nm. The laser ablation process was modeled for a set of reference samples of quaternary Cu/Sn/Pb/Zn alloys and the difference between plume composition and known target stoichiometry was estimated for both of the wavelengths considered. LIBS measurements were performed on the same set of reference samples and under the same experimental conditions to validate the model at different wavelengths. Results from the application of the model to calculate sample optical properties during laser irradiation, absorption in the plasma and plasma temperature are also presented.
