Dissociation dynamics of ethylene (C₂H₄) probed by time-resolved coincident ion momentum imaging

The dissociation dynamics of ethylene (C₂H₄) induced by double-photon absorption of the deep UV (DUV) pulse is probed by the near-infrared (NIR) laser pulse at a peak intensity of 6.4 x 10¹⁴Wcm^-2. Hydrogen migration channel leading to ethylene(C₂H₄⁺) -ethylidene (HC-CH₃⁺) isomerization are observed. Delay-dependent effects are observed in dominant CH₂⁺ + CH₂⁺ (symmetric breakup) and weak CH⁺ + CH₃⁺ (hydrogen migration) two-body dissociation channels. The yields of these two channels are compared at the different pump and probe power to understand the mechanistic aspects of the dissociation dynamics.