The electron swarm method as a tool to investigate multi-body electron attachment processes |
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| Affiliation: | 1. University of Oxford, Department of Physics, Oxford, OX1 3RH, UK;2. STFC Boulby Underground Science Facility, Boulby Mine, Redcar-and-Cleveland, TS13 4UZ, UK;3. Imperial College London, Physics Department, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK;4. University College London (UCL), Department of Physics and Astronomy, Gower Street, London, WC1E 6BT, UK;5. University of Sheffield, Department of Physics and Astronomy, Sheffield, S3 7RH, UK;6. STFC Rutherford Appleton Laboratory (RAL), Didcot, OX11 0QX, UK |
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| Abstract: | The electron swarm method has been used for the investigation of multi-body thermal electron attachment process. Ethylene, carbon dioxide and their mixtures were used as carrier gases. The rate constant for the reaction of thermal electrons with SF6 has been measured and found to be (2.5±0.2) × 10-7 cm3·mol-1·s-1. The mechanism and kinetics of thermal electron capture by N2O was investigated in the mixtures with C2H4 and CO2. A mechanism involving neutral van der Waals molecules (N2O·CO2) has been proposed and the rate constants calculated to be 1.9 × 10-10 cm3·mol-1·s-1 for the formation of (N2O·CO2) and 1.8 × 10-30 cm6·mol-2·s-1 for the three-body reaction with CO2 as a stabilizing agent. |
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