Atomic site sensitive processes in low energy ion-dimer collisions

Abstract : Electron capture processes for low energy Ar9+ ions colliding on Ar2 dimer targets are investigated, focusing attention on charge sharing as a function of molecule orientation and impact parameter. A preference in charge-asymmetric dissociation channels is observed, with a strong correlation between the projectile scattering angle and the molecular ion orientation. The measurements provide here clear evidences that projectiles distinguish each atom in the target and, that electron capture from near-site atom is favored. Monte Carlo calculations based on the classical over-the-barrier model, with dimer targets represented as two independent atoms, are compared to the data. They give a new insight into the dynamics of the collision by providing, for the di erent electron capture channels, the two-dimensional probability maps p(~b), where ~b is the impact parameter vector in the molecular frame.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00989772
Contributor : Sandrine Guesnon <>
Submitted on : Monday, May 12, 2014 - 2:06:41 PM
Last modification on : Tuesday, February 19, 2019 - 9:58:02 AM
Long-term archiving on : Tuesday, August 12, 2014 - 11:45:31 AM

Files

Iskandar_2014.pdf
Files produced by the author(s)

Identifiers

Citation

W. Iskandar, J. Matsumoto, A. Leredde, X. Fléchard, B. Gervais, et al.. Atomic site sensitive processes in low energy ion-dimer collisions. Physical Review Letters, American Physical Society, 2014, 113, pp.143201. ⟨10.1103/PhysRevLett.113.143201⟩. ⟨in2p3-00989772⟩

Share

Metrics

Record views

602

Files downloads

480