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

29th International Conference on Photonic, Electronic, and Atomic Collisions

Poveda, Juan Carlos^1 ; Álvarez, Ignacio^2 ; Cisneros, Carmen^2

Escuela de Química, Laboratorio de Espectroscopia Atómica Molecular, Industrial de Santander, Bucaramanga, Colombia^1

Laboratorio de Colisiones Atómicas Moleculares, Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Morelos, Cuernavaca, Mexico^2

关键词: Adiabatic expansion;    High-vacuum chambers;    Keldysh;    Molecule interactions;    Photoionization process;    Photon absorptions;    Photophysics;    YAG laser;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112038/pdf
DOI  :  10.1088/1742-6596/635/11/112038

来源: IOP

【 摘 要 】

The cooled molecular beams of acenes compounds as naphthalene C10H8, anthracene C14H10, and ben- zantracene C18H12, were produced by adiabatic expansion in high vacuum chamber, 10-8torr. Molecular beams interacted with laser radiation of 266 and 355 nm, from a Ng:YAG laser at intensities up to 1010W•cm-2At 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.