Abstract :
We study the time of flight optical emission from titanium and tungsten nanosized particles, generated through femtosecond laser-matter
interaction in vacuum, in the wavelength spectral range from 300 to 900 nm. Typical spectra consist of broadband structureless signals similar to
black body emission from a macroscopic object. Nanoparticles temperature, deduced from their emission spectra, decreases drastically as a
function of their time of arrival at a given distance from the target. This behaviour is seen to be independent of individual particle velocities
