Isotope effect for the thermal F + H2 reaction: An Arrhenius kinetics experiment based upon nuclear recoil techniques

Abstract Modified nuclear hot atom techniques have been used to characterize the kinetic isotope effect for the reaction of atomic fluorine with molecular hydrogen under conditions of thermal initiation. The following Arrhenius temperature dependence was obtained for the isotopic rate constant ratio: k H 2 / k D 2 = (1.11 ± 0.05) exp [(356 ± 26)/ RT ] temperature range 303–475°K.