Dissociative recombination of LiH2+

R. D. Thomas, A. Ehlerding, W. D. Geppert, F. Hellberg, V. Zhaunerchyk, M. Larsson, E. Bahati, M. E. Bannister, M. R. Fogle, C. R. Vane

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Abstract

In this paper, we report results regarding how LiH2+ fragments as a result of a low-energy collision with an electron (dissociative recombination), a reaction that contains only elements and particles created during the very first phase of the universe. The collision-energy-dependent reaction rate and cross sections show detailed structures, more so than predicted by theory, suggesting significant rovibrational coupling in the ion and a complex reaction surface. From the structure of the molecule, the reaction predominantly results in the formation of Li+H2. However, 23% of the reaction flux leads to more interesting products, with 17% producing Li+2H and 6% producing LiH+H. These last two channels break the strongest molecular bond in the system and, in the case of the latter channel, form a significantly weaker ionic bond. Possible reasons behind this interesting behavior are discussed, together with the interaction between the available reaction channels.

Original languageEnglish
Article number050701
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume89
Issue number5
DOIs
StatePublished - May 29 2014

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