Recombination of H3+ Ions in the Afterglow of a He-Ar-H2 Plasma

Details Recombination of H3+ Ions in the Afterglow of a He-Ar-H2 Plasma Recombination of H3+ Ions in the Afterglow of a He-Ar-H2 Plasma

2007-10-11

arxiv.org/abs/0710.2339v1

Physics

Atomic Physics

4 figures

Scientific paper

10.1088/0953-4075/41/19/191001

Recombination of H3+ with electrons was studied in a low temperature plasma in helium. The plasma recombination rate is driven by two body, H3+ + e, and three-body, H3+ + e + He, processes with the rate coefficients 7.5x10^{-8}cm3/s and 2.8x10^{-25}cm6/s correspondingly at 260K. The two-body rate coefficient is in excellent agreement with results from storage ring experiments and theoretical calculations. We suggest that the three-body recombination involves formation of highly excited Rydberg neutral H3 followed by an l- or m- changing collision with He. Plasma electron spectroscopy indicates the presence of H3.

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