Temperature dependence of the laser-induced fluorescence of UF6 in the A--X band

The temperature dependence of the time-resolved laser-induced fluorescence (LIF) of gaseous UF6 has been investigated in 10 0C increments from -30 to 80 0C over the 0.005--85 Torr pressure range. The UF6 was excited to the A state with a pulsed dye laser at 392.1 nm and the fluorescence emission peaked at 421 nm and was monitored to determine the LIF lifetime. The pressure/lifetime data at each temperature have been fit by computer with our LIF kinetic expression reported previously in this journal [J. Chem. Phys. 69, 2181 (1978)]. The six quenching rate constants of our kinetic model have been evaluated in terms of their temperature dependences. Each rate constant has been represented with an Arrhenius type expression; pre-exponential A factors and activation energies are presented