Investigation of the Carbon Monoxide Dication Lifetime Using (CO)$_2$ Dimer Fragmentation - Équipe AMA « Atomes, molécules et agrégats » du CIMAP Accéder directement au contenu
Article Dans Une Revue Physical Review A Année : 2021

Investigation of the Carbon Monoxide Dication Lifetime Using (CO)$_2$ Dimer Fragmentation

Résumé

The fragmentation of carbon monoxide dimers induced by collisions with low-energy Ar9+ ions is investigated using the cold target recoil ion momentum spectroscopy technique. The presence of a neighbor molecule in the dimer serves here as a diagnostic tool to probe the lifetimes of the CO2+ molecular dications resulting from the collision. The existence of metastable states with lifetimes ranging from 2 ps to 200 ns is clearly evidenced experimentally through a sequential three-body fragmentation of the dimer, whereas fast dissociation channels are observed in a so-called concerted three-body fragmentation process. The fast fragmentation process leads to a kinetic energy release distribution also observed in collisions with monomer CO targets. This is found in contradiction with the conclusions of a previous study attributing this fast process to the perturbation induced by the neighbor molecular ion.
Fichier principal
Vignette du fichier
2107.08954.pdf (4.27 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03313237 , version 1 (06-10-2021)

Identifiants

Citer

A. Méry, X. Fléchard, S. Guillous, V. Kumar, M. Lalande, et al.. Investigation of the Carbon Monoxide Dication Lifetime Using (CO)$_2$ Dimer Fragmentation. Physical Review A, 2021, 104 (4), pp.042813. ⟨10.1103/PhysRevA.104.042813⟩. ⟨hal-03313237⟩
132 Consultations
23 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More