Vacuum UV laser-induced fluorescence study of the collisional removal of Br(2P1/2) atoms by small molecules

This Letter reports on the application of the vacuum ultraviolet laser-induced fluorescence detection of Br(2P1/2) atoms at 157.48 nm to the kinetic study of collisional removal of Br(2P1/2) by small molecules at 295 K. Gas mixtures of a small amount of CH3Br and an excess amount of collision partners are exposed to pulsed laser irradiation at 193 nm. Temporal decay profile of the Br∗ LIF intensity has been monitored to determine the collisional removal rate coefficients. The collision partners are H2, CO2, CF4, CF2H2, H2O, CH3OH, and SF5CF3, and the results are compared to literature data.