Explanipedia

Structural and Chemical Studies of the Nanoscale Modifications Induced by Swift Heavy Ion Irradiation in SrTiO3 at Grazing Incidence Open

Mohammad Shah Jamal, Victor Pierron, T. B. Tagiyev, Jérémy Blond, S. Guillous , et al. · 2025

Swift Heavy Ion (SHI) irradiation offers a powerful approach for tailoring structural and chemical properties of materials through precise energy deposition mechanisms. This study explores nanoscale structural and chemical transformations …

Molten salt ion source using glass capillaries as emitter Open

M. Léger, E. Giglio, S. Guillous, A. Houël · 2024

A proof of concept of an ion source using a molten salt mixture rich in Cs and O ions, able to emit an ion current both in positive and negative polarities, is presented. Similar to liquid metal ion sources, the ions of the salt are emitte…

SrTiO3 surface micro-structuring with swift heavy ions in grazing incidence geometry Open

Radia Rahali, H. Lebius, A. Benyagoub, E. Gardes, S. Guillous , et al. · 2023

Nanoscale multiply charged focused ion beam platform for surface modification, implantation, and analysis Open

Mathieu Lalande, Pierre Salou, A. Houël, T. Been, Thierry Birou , et al. · 2022

The PELIICAEN (Platform for the Study of Ion Implantation Controlled and Analyzed at the Nanometric Scale) setup is a unique device, both for all of its in situ ultra-high vacuum equipment (focused ion beam column, secondary electron micro…

Coulomb-explosion imaging of carbon monoxide dimers Open

A. Méry, V. Kumar, X. Fléchard, B. Gervais, S. Guillous , et al. · 2021

We report on experimental results obtained from collisions of slow highly\ncharged Ar9+ ions with a carbon monoxide dimer (CO)2 target. A COLTRIMS setup\nand a Coulomb explosion imaging approach are used to reconstruct the structure\nof th…

Influence of the viscosity and charge mobility on the shape deformation of critically charged droplets Open

E. Giglio, J. Rangama, S. Guillous, T. Le Cornu · 2020

In this work, we model and simulate the shape evolution of critically charged droplets, from the initial spherical shape to the charge emission and back to the spherical shape. The shape deformation is described using the viscous correctio…

Ion induced fragmentation of diatomic molecular clusters Open

A. Méry, A. Agnihotri, J. Douady, X. Fléchard, B. Gervais , et al. · 2020

Synopsis Weakly bound atomic or molecular clusters are of growing interest in the fields of atmospheric science, hadron-therapy or astrophysics. We will present our recent experimental results on the fragmentation of diatomic molecular dim…

Investigating the CO trimer geometry using Coulomb imaging technique Open

X. Fléchard, A. Méry, B. Gervais, S. Guillous, V. Kumar , et al. · 2020

Synopsis The Coulombic explosion of multi-charged (CO)3 q+ molecular ions produced in low energy collisions with Ar 9+ projectiles was investigated using recoil ion momentum spectrometry (RIMS). A preliminary analysis of the data clearly s…

Ion-beam focusing by self-organized axis-symmetric potentials in insulating capillaries Open

E. Giglio, S. Guillous, A. Cassimi · 2018

In a combined theoretical and experimental study, we give evidence that the self-organized electric potential in tapered glass capillaries has the strength to focus a low-energy ion beam. Similar to Einzel lenses, the on-axis injected beam…

Coulomb over-the-barrier Monte Carlo simulation to probe ion-dimer collision dynamics Open

Waêl Iskandar, X. Fléchard, Jun Matsumoto, A. Leredde, S. Guillous , et al. · 2018

We present a combined theoretical and experimental study of primary and post-collision mechanisms involved when colliding low energy multiply charged ions with van der Waals dimers. The collision dynamics is investigated using a classical …

Anisotropic two-body dissociation by highly charged ion impact Open

Jyoti Rajput, A. Agnihotri, A. Cassimi, X. Fléchard, S. Guillous , et al. · 2017

International audience

Evolution of the electric potential of an insulator under charged particle impact Open

E. Giglio, S. Guillous, A. Cassimi, H. Q. Zhang, Gyula Nagy , et al. · 2017

Insulating glass capillaries have been shown to lead to ion transmission without any change in either the ion charge state or in the ion kinetic energy. This surprising process has been attributed to a self-organized distribution of charge…

The neutrons for science facility at SPIRAL-2 Open

X. Ledoux, M. Aïche, M. Avrigeanu, V. Avrigeanu, E. Balanzat , et al. · 2017

Numerous domains, in fundamental research as well as in applications, require the study of reactions induced by neutronswith energies between a few MeV and a few tens of MeV. Reliable measurements are necessary to improve the evaluated dat…

Atomic Site-Sensitive Processes in Slow Ar9+-Ar2 Collisions Open

Waêl Iskandar, Jun Matsumoto, A. Leredde, X. Fléchard, S. Guillous , et al. · 2015

International audience

Interatomic Coulombic Decay in Low Energy Ion-Dimer Collisions Open

Waêl Iskandar, Jun Matsumoto, A. Leredde, X. Fléchard, S. Guillous , et al. · 2015

Expérience GANIL/CIMAP

Combined theoretical and experimental study of the transmission of tilted ion beams through macroscopic conical glass capillaries Open

E. Giglio, Hong Zhang, S. Guillous, A. Agnihotri, F. Ropars , et al. · 2015

The transmission as a function of the tilt angle of a 3 keV Ar+ ion beam through a conical macroscopic glass capillary is studied theoretically and experimentally. It was found that the charge patches which are responsible for the ion guid…

Primary processes: from atoms to diatomic molecules and clusters Open

X. Fléchard, L. Adoui, G. Ban, P. Boduch, A. Cassimi , et al. · 2015

International audience

Interatomic Coulombic Decay as a New Source of Low Energy Electrons in Slow Ion-Dimer Collisions Open

Waêl Iskandar, Jun Matsumoto, A. Leredde, X. Fléchard, B. Gervais , et al. · 2015

We provide the experimental evidence that the single electron capture process in slow collisions between O^{3+} ions and neon dimer targets leads to an unexpected production of low-energy electrons. This production results from the interat…

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