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Atoms 2018, 6(4), 68; https://doi.org/10.3390/atoms6040068

Transverse Momentum Transfer Distributions Following Single Ionization in 3.6 MeV/amu Au53+ + He Collisions: A 4-Body Classical Treatment

Université de Caen-Normandie, Centre Interdisciplinaire de Recherche sur les Ions, la Matière et la Photonique, 6 bd du Maréchal Juin, 14050 Caen Cedex, France
Received: 4 October 2018 / Revised: 27 November 2018 / Accepted: 29 November 2018 / Published: 3 December 2018
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Abstract

A four-body classical model based on the resolution of Hamilton equations of motion was used here to determine and analyze ionization doubly-differential cross sections following 3.6 MeV/amu Au53+ + He collisions. Our calculation was not able to reproduce the binary peaks experimentally observed in the transverse momentum distributions for electron emission energies larger than 10 eV. Surprisingly, by introducing a large number of free or quasi-free electrons that followed the projectile at the same velocity, the agreement between the experiment and our calculation was improved, since our model reproduced, at least qualitatively, the experimental binary peaks. The origin of the presence of such electrons is discussed. View Full-Text
Keywords: ion-atom collisions; single ionization; strong perturbation regime; Classical Trajectory Monte Carlo (CTMC) calculations; fully differential cross sections ion-atom collisions; single ionization; strong perturbation regime; Classical Trajectory Monte Carlo (CTMC) calculations; fully differential cross sections
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Frémont, F. Transverse Momentum Transfer Distributions Following Single Ionization in 3.6 MeV/amu Au53+ + He Collisions: A 4-Body Classical Treatment. Atoms 2018, 6, 68.

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