Molecular Frame Photoelectron Angular Distributions of 1,1-Dichloroethene (C₂H₂Cl₂) Dissociated by 211.9 eV Photons at the Chlorine L-edge

Photoionization and dissociation of 1,1-Dichloroethene at the Chlorine L-edge was performed with soft X-rays photons from the Advanced Light Source (ALS) on Beamline 9.0.1. The photon energy of 211.9 eV was used, which subsequently results in expected photoelectron energies of 4 and 5.7 eV. Data was collected to examine the correlated momenta of the molecular fragments and the photoelectron in coincidence using the COld-Target-Recoil-Ion Momentum Spectroscopy (COLTRIMS) method. Dissociation channels in the target involving two separate H+ ions contain substantial and unexpected proportion of measured electrons between 0-2 eV. These electrons indicate the possible presence of Post-Collisional Interaction (PCI) streaking effects, which would correlate to a molecular dissociation time in the hundreds of attoseconds. Other potential explanations for these low energy electrons will be examined. Results for channels including H+H+X and H+H+X+ measurements will be discussed.