Abstract
Laser ablation of deposited silver colloids, active in SERS, is carried out at three different laser
wavelengths (KrF, XeCl and Nd:YAG at λ = 248, 308 and 532 nm respectively). Emission
form excited neutral Ag and Na atoms, present in the ablation plume, is detected with
spectral and temporal resolution. The expansion velocity of Ag in the plume is estimated in