The reactions of hot (n, γ)-produced 17.6 m 80Br with methyl bromide were studied in the presence of He and Kr as moderators. The survival probability of the reaction products was found to be the same in both moderators, suggesting that no observable decomposition took place upon moderation (within a 15% error). The reactivity integral for halogen displacement in the reaction was found to be equal to that in the system 38C1+CH3C1, which seems reasonable since the activation energies and steric factors are almost equal. The ratio of hydrogen displacement to halogen displacement was smaller in the case of 80Br than in that of 38Cl, as can be predicted on the basis of the translational inertial factor. From the reactivity integrals and the activation energies the excitation functions for halogen displacement were calculated by the energy-dependent hard potential model of Baer and Amiel.
ASJC Scopus subject areas
- Physics and Astronomy (all)
- Physical and Theoretical Chemistry