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Article Dans Une Revue Physical Review A Année : 2021

Coulomb-explosion imaging of carbon monoxide dimers

Résumé

We report on experimental results obtained from collisions of slow highly charged Ar9+ ions with a carbon monoxide dimer (CO)2 target. A cold target recoil ion momentum spectroscopy setup and a Coulomb explosion imaging approach are used to reconstruct the structure of the CO dimers. The three-dimensional structure is deduced from the two-body and three-body dissociation channels from which both the intermolecular bond length and the relative orientation of the two molecules are determined. For the three-body channels, the experimental data are interpreted with the help of a classical model in which the trajectories of the three emitted fragments are numerically integrated. We measured the equilibrium intermolecular distance to be Re=4.2Å. The orientation of both CO molecules with respect to the dimer axis is found to be quasi-isotropic due to the large vibrational temperature of the gas jet.
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hal-03210399 , version 1 (06-10-2021)

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A. Méry, V. Kumar, X. Fléchard, B. Gervais, S. Guillous, et al.. Coulomb-explosion imaging of carbon monoxide dimers. Physical Review A, 2021, 103 (4), pp.042813. ⟨10.1103/PhysRevA.103.042813⟩. ⟨hal-03210399⟩
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