The reaction of Hg(3P1) with ethylene at room temperature has been rehyphen;investigated. Special attention was paid to the effects of the concentrations of ethylene and mercury on the reaction velocity. The results are in general agreement with a mechanism which requires the excited ethylene, produced initially, to decompose both in the gas phase and on the wall. The results are also compatible with the suggestion that a significant fraction of the quenching collisions between ethylene and Hg(3P1) leads to the formation of metastable (3P0) atoms.
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