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Updated: May 12, 2026

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
Binary recombination of H3(+) and D3(+) ions with electrons in plasma at 50-230 K
Peter Rubovič1, Petr Dohnal, Michal Hejduk
1Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University , Prague 18000, Czech Republic.
Abstract:
The results of an experimental study of the H3(+) and D3(+) ions recombination with electrons in afterglow plasmas in the temperature range 50-230 K are presented. A flowing afterglow apparatus equipped with a Langmuir probe was used to measure the evolution of the electron number density in the decaying plasma. The obtained values of the binary recombination rate coefficient are αbinH3(+) = (6.0 ± 1.8) × 10(-8)(300/T)(0.36±0.09) cm(3) s(-1) for H3(+) ions in the temperature range 80-300 K and αbinD3(+) = (3.5 ± 1.1) × 10(-8)(300/T)(0.73±0.09) cm(3) s(-1) for D3(+) ions in the temperature range 50-300 K. This is the first measurement of the binary recombination rate coefficient of H3(+) and D3(+) ions in a plasma experiment down to 50 K.
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