Calculation of the reactive cross section for alkali atoms reacting with bromine molecules

Reactive cross sections have been computed for the five alkali metals reacting with bromine molecules. The computations were carried out on the potential energy surfaces described in the companion paper. A new type of reaction mechanism, vibrational capture, is predicted to occur for these systems. The calculated cross sections agree well with the experimental data at low collision energies. At higher energies there are indications that not all reactions at small impact parameters are reactive.