Multiple-photon absorption in cooled molecular beams of acenes compounds at 266 and 355 nm laser radiation

Abstract

SynopsisThe cooled molecular beams of acenes compounds as naphthalene C10H8, anthracene C14H10, and ben- zantracene C18H12, were produced by adiabatic expansion in high vacuum chamber, 10-8 torr. Molecular beams interacted with laser radiation of 266 and 355 nm, from a Ng:YAG laser at intensities up to 1010 W·cm-2 At higher intensities the multiple photon absorption was possible. The number of photons was calculated using Keldysh approach. The dominant photophysics of photon-molecule interactions were photodissociation and photoionization processes depending on the wavelength used during the experiment.