Velocity map imaging of femtosecond photodynamics in CF3I

The femtosecond photodynamics of CF3I were studied employing the velocity mapping ion imaging technique. The angular and velocity distributions of I+ fragments were obtained as a function of the time delay between a femtosecond pump pulse at 264 nm and a probe pulse at 396 nm. The images reveal a dependence of the three-dimensional recoil distributions on the pump–probe delay time and the mutual polarization direction of pump and probe pulses. The ion velocity images provide information on the competition of different multi-photon pathways producing the ionic fragments.