(a) TOF spectra recorded at selected laboratory angles (9﹩\mathop{.}\limits^{^\circ }﹩25, 14﹩\mathop{.}\limits^{^\circ }﹩25, and 19﹩\mathop{.}\limits^{^\circ }﹩25) for the H loss channel (m/z = 51) in the 193 nm photodissociation of vinylacetylene (C₄H₄). Open circles represent the experimental data, while the red lines correspond to the best-fit forward-convolution simulations using a single-channel model. (b) Center-of-mass translational energy distribution, P(E_T), derived from the best-fit simulation. The shaded region indicates the uncertainty range in the fit.