Investigating the CO trimer geometry using Coulomb imaging technique

X. Fléchard (1) , A. Méry (2) , B. Gervais (2) , S. Guillous (2) , V. Kumar (2) , J. Matsumoto , J. Rangamma (2) , F. Ropars (2) , H. Shiromaru , A. Cassimi (2)

1 LPCC - Laboratoire de physique corpusculaire de Caen
2 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique

The Coulombic explosion of multi-charged (CO)3 q+ molecular ions produced in low energy collisions with Ar9+ projectiles was investigated using recoil ion momentum spectrometry (RIMS). A preliminary analysis of the data clearly shows a dominant triangular cyclic structure. Events that may correspond to a linear chain are also observed, but the latter could as well originate from false coincidences, associated to the fragmentation of dimers. A careful analysis of this source of background is proposed to disentangle trimer fragmentation events from false coincidences.

Domaines: Physique [physics]

X. Fléchard, A. Méry, B. Gervais, S. Guillous, V. Kumar, et al.. Investigating the CO trimer geometry using Coulomb imaging technique. 31st International Conference on Photonic, Electronic, and Atomic Collisions, Jul 2019, Deauville, France. pp.132047, ⟨10.1088/1742-6596/1412/13/132047⟩. ⟨hal-02870852⟩