Abstract

A high pressure microwave discharge source operating with a dilute mixture of O 2 in Ne has been used to produce a supersonic nozzle beam of O atoms seeded in Ne. This low energy supersonic O atom beam has been used to study the reactive scattering of O atoms with Cl 2 and CS 2 molecules at an initial translational energy E = 13 kJ mol −1. The results are compared with rective scattering from the same reactions using a high energy O atom beam formed by seeding O atoms in He. The O + Cl 2 reaction proceeds via a short-lived collision complex where the lifetime of the collision complex depends upon the initial translational energy. However the O + CS 2 reaction follows a stripping mechanism which is unaffected by initial translational energy.

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