Multiphoton dissociation of C2H4FCl under the action of a CO2 laser. Energy distribution of the decomposing molecules

Multiphoton dissociation of C 2 H 4 FCl molecules in the field of pulsed CO 2 laser radiation is discussed. It has been found that the decomposing molecules absorb approximately the same energy above the dissociation threshold ( E + = 10–15 kcal/mole) independent of the vibrational mode to take part in the first stage of excitation. The energy distribution function profile of decomposing molecules was determined through the dependent of the C 2 H 4 FCl multiphoton dissociation yield and the ratio of products on a buffer gas pressure. This distribution is an equilibrium one [Boltzmann distribution without exp (− E/kT )], truncated at the high energy limit ( E * = 75–78 kcal/mole).