One- and Two-Color Infrared Multiphoton Dissociation of C₃F₆

Abstract

Multiphoton dissociation of C3F6 induced by one and two infrared laser beams is studied. The contribution of the different collisional processes to the yield is quantified using the recently extended McRae et al. model. It has been shown that the increase of the fluence in single irradiation and the change to the red of the second infrared pulse in double-beam experiments can have equivalent effects on the dissociation. These effects are an important increment in the yield and the extinction of the influence of the homogeneous collisions between C3F6 molecules on the process. In double-irradiation experiments, the introduction of time delays between the two laser pulses also leads to large enhancements of the dissociation, giving rise to two yield maxima when the delays are around 2 and 65 μs. A change in the final proportion of the dissociation products induced by modifying the frequency of the second pulse has been detected in the double-irradiation experiments.