Electronic to vibrational energy transfer from Br(42P1/2) to CO2, COS, and CS2

In this paper, we report a study of the quenching of Br(42P1/2) by CO2, COS, and CS2. Laser photolysis of gas samples containing Br2 and the molecular species of interest produces Br(42P1/2), and the subsequent quenching of this species results in vibrational excitation of the molecule of interest. By monitoring the time resolved ir fluorescence from Br(42P1/2) and the (001) states of CO2, COS, and CS2, we are able to measure the quenching rate coefficients for these species as well as rate coefficients for a number of V–V,T,R processes. By comparing the intensities of the Br(42P1/2) and (001) state fluorescences, we measure directly the rate coefficients for electronic to vibrational (E→V) energy transfer into the product states that contain at least one quantum of ν3 vibration.