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Journal Article

Ion-atom-atom three-body recombination: From the cold to the thermal regime


Mirahmadi,  Marjan
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Mirahmadi, M., & Pérez-Ríos, J. (2023). Ion-atom-atom three-body recombination: From the cold to the thermal regime. The Journal of Chemical Physics, 158(2): 024103. doi:10.1063/5.0134132.

Cite as: https://hdl.handle.net/21.11116/0000-000C-93F5-9
We present a study on ion–atom–atom reaction A + A + B+ in a wide range of systems and collision energies ranging from 100 μK to 105 K, analyzing two possible products: molecules and molecular ions. The dynamics is performed via a direct three-body formalism based on a classical trajectory method in hyperspherical coordinates developed in Pérez-Ríos et al. [J. Chem. Phys. 140, 044307 (2014)]. Our chief finding is that the dissociation energy of the molecular ion product acts as a threshold energy, separating the low- and high-energy regimes. In the low-energy regime, the long-range tail of the three-body potential dictates the fate of the reaction and the main reaction product. On the contrary, in the high-energy regime, the short-range of atom–atom and atom–ion interaction potential dominate the dynamics, enhancing molecular formation.