Coulomb explosion imaging of concurrent CH${}_2$BrI photodissociation dynamics

Abstract

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.

19 pages, 6 figures. Accepted for publication in Physical Review A

Cited by in corpus (1)

• Probing the UV-Induced Photodissociation of CH${}_{\text{3}}$I and C${}_{\text{6}}$H${}_{\text{3}}$F${}_{\text{2}}$I with Femtosecond Time-Resolved Coulomb Explosion Imaging at FLASH