Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 4: Strong-field Ionization and Imaging (joint session MO/A)
MO 4.1: Vortrag
Montag, 11. März 2024, 17:00–17:15, HS 3044
Strong-Field Ionization of Nitrous Oxide Molecule by Short Femtosecond Laser Pulses — •Feras Afaneh — Physics Department, The Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
The dissociative photoionization of nitrous oxide molecules, an important atmospheric trace gas, induced by circularly and elliptically polarized laser pulses has been studied by photoelectron photoion coincidence (PEPICO) spectroscopy. PEPICO spectra were used to identify different dissociative photoionization channels. It is observed that the ionized N2O and its fragments have different correlation trends at different polarization schemes. The relative contributions of different double and triple dissociative ionization channels to the total fragment ion yield are also deduced from the coincident spectra of these channels. The results show that the double dissociative photoionization channels: the denitrogenation (N2O2+ –> N+ + NO+) and the deoxygenation ( N2O2+ –> O+ + N2+). Furthermore, a considerable contribution of the triple dissociative ionization channels to the total fragment ion yield is also observed. The channels "N+ + NO+" and "O+ + N2+" can be explained by dissociation via the X3Σ− and 13Π states of N2O2+ as the major peaks in the measured kinetic energy release spectra suggested.
Keywords: Strong-Field Ionization; dissociative photoionization; Nitrous Oxide Molecule; Short Femtosecond Laser Pulses; PEPICO spectroscopy