(a) TOF spectra recorded at laboratory angles from 9﹩\mathop{.}\limits^{^\circ }﹩25 to 49﹩\mathop{.}\limits^{^\circ }﹩25 for the C₂H₂/CCH₂ loss channel (m/z = 26) in the 193 nm photodissociation of vinylacetylene (C₄H₄). Open circles represent the experimental data. The green dotted line corresponds to the best-fit forward-convolution simulation, while the red, blue, and purple curves (solid lines) denote the individual contributions from dissociative ionization of the H loss channel (m/z = 51), H₂ loss channel (m/z = 50), and the true C₂H₂/CCH₂ loss channel, respectively. (b) Center-of-mass translational energy distributions, P(E_T), for the H loss (red), H₂ loss (blue), and C₂H₂/CCH₂ loss (purple) channels derived from the best-fit simulations. The shaded regions indicate the uncertainties in the fits.