Photoionization and Photofragmentation Dynamics of I₂ in Intense Laser Fields: A Velocity-Map Imaging Study.

ABSTRACT: The photoionization and photofragmentation dynamics of I₂ in intense femtosecond near-infrared laser fields were studied using velocity-map imaging of cations, electrons, and anions. A series of photofragmentation pathways originating from different cationic electronic states were observed following single ionization, leading to I⁺ fragments with distinct kinetic energies, which could not be resolved in previous studies. Photoelectron spectra indicate that these high-lying dissociative states are primarily produced through nonresonant ionization from several molecular orbitals (MO) of the neutral. The photoelectron spectra also show clear signatures of resonant ionization pathways (Freeman resonances) to low-lying bound ionic states via Rydberg states of the neutral m

SUBMITTER: Allum F 

PROVIDER: S-EPMC9706571 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature