engleski

Spectroscopic properties of the Li, Zn and Li-Zn alloy plasmas generated by XeCl-laser ablation

We have produced by 308 nm laser ablation lithium, zinc and lithium-zinc plasmas and have studied their spectral, temporal and spatial characteristics. In pure lithium plume linear Stark effect is observed on n$% ^{2}$D-2$^{2}$P transitions (n=3, 4, 5, 6) up to 0.3 $mu s$ after the laser pulse. In pure zinc plume both atomic and ionic spectral lines are observed. Time evolution of spectral line intensities suggests that responsible mechanism for population of atomic zinc states goes through a cascade of ion-electron recombination processes. The ablation of Li-Zn alloy shows much faster decay of Zn spectral features than of Li spectral lines and therefore the decomposition of plume into shells of different colors is observable.

laser ablation; Li; Zn; Li-Zn plasmas; spectral; temporal and spatial characteristics of plumes

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