Rate constants for ozone formation and for isotopic exchange reactions

Abstract

Rate constants for the formation of ozone O 2 + O + M → O 3 + M and the isotopic substitution reactions 16O + 18O 2→ 16O 18O + 18O, and 18O + 16O 18O→ 18O 2 + 16O have been calculated using two different potential energy surfaces. The calculations have been carried out using a quasiclassical trajectory method in which the classical equations of motion are solved using hypersperical coordinates for the three-body problem. The ter-molecular rate constant for the formation of ozone has been obtained from the calculated life-times of the ozone molecules formed by the O 2 + O collisions using a simple collision model for the O 3 + M stabilization.