Coulomb explosion imaging of concurrent CH\(_{2}\)BrI photodissociation dynamics

The dynamics following laser-induced molecular photodissociation of gas-phase CH\(_{2}\)BrI at 271.6 nm were investigated by time-resolved Coulomb explosion imaging using intense near-IR femtosecond laser pulses. The observed delay-dependent photofragment momenta reveal that CH\(_{2}\)BrI undergoes C-I cleavage, depositing 65.6% of the available energy into internal product states, and that absorption of a second UV photon breaks the C-Br bond of CH\(_{2}\)Br. Simulations confirm that this mechanism is consistent with previous data recorded at 248 nm, demonstrating the sensitivity of Coulomb explosion imaging as a real-time probe of chemical dynamics.