TOF spectra recorded at laboratory angles from 9﹩\mathop{.}\limits^{^\circ }﹩25 to 49﹩\mathop{.}\limits^{^\circ }﹩25 for m/z = 25 in the 193 nm photodissociation of vinylacetylene (C₄H₄). Open circles represent the experimental data. The spectra are reproduced by forward-convolution simulations incorporating contributions from atomic hydrogen loss, molecular hydrogen loss, and the C₂H₂/CCH₂ loss channel. The red, blue, and purple curves denote the individual contributions arising from dissociative ionization of the H loss channel (m/z = 51), the H₂ loss channel (m/z = 50), and the true C₂H₂/CCH₂ loss channel, respectively.