Abstract
Recombination of Br atoms in Ar was studied by 3D trajectory calculations between 300 and 1500°K. The recombination path via unstable Br–Ar quasidimers was included in the calculations, which yield recombination rate constants in agreement with experiment within a factor of 2, provided that the ArBr Lennard‐Jones interaction is of the order of 0.5 kcal/mole.