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          Institute: MPI für Kernphysik     Collection: Physics of Quantum Dynamics in Atomic Fragmentation     Display Documents

ID: 522295.0, MPI für Kernphysik / Physics of Quantum Dynamics in Atomic Fragmentation
Distorted Wave Theories Applied to Double Ionization by Ion Impact: Simulation of Higher-Order Processes
Authors:Ciappina, M. F.; Kirchner, T.; Schulz, M.; Fischer, D.; Moshammer, R.; Ullrich, J.
Date of Publication (YYYY-MM-DD):2010-04
Title of Journal:Journal of Atomic, Molecular and Optical Physics
Start Page:1
End Page:7
Sequence Number of Article:231329
Copyright:© 2010 Hindawi Publishing Corporation. All rights reserved.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:One of the goals in studies of double ionization (DI) of simple atoms by electron or ion impact is to elucidate and assess the different mechanisms that lead to this atomic process. In this work we present an attempt to model the mechanisms beyond the first order in DI of helium by highly charged projectiles. To this end we employ the continuum distorted wave-eikonal initial state (CDW-EIS) formalism joint with a Monte Carlo event generator (MCEG). The MCEG allows us to generate theoretical event files that represent the counterpart of the data obtained from a kinematically complete experiment. Starting from these event files, a new data analysis tool used to contrast theory and experiment in DI, the four-body Dalitz plots, is easily produced. The higher order mechanisms are simulated by considering DI as a sequential process: a single ionization of a helium atom as a first step and another single ionization of a single-charged helium ion as a second step. Some of the features in the experimental data are very well reproduced by these simulations.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group of J. Ullrich/Strong-Fields Physics (R. Moshammer)
MPI für Kernphysik/Independent Research Groups/Ein ultrakaltes Target für Präzisionsuntersuchungen von Schwerionen-Atom-Stößen (PRIOC) Dr. Daniel Fischer
External Affiliations:Institute of High Performance Computing, 1 Fusionopolis Way, #16-16 Connexis, 138632, Singapore
Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada
Department of Physics and Laboratory for Atomic, Molecular, and Optical Research, Missouri University of Science and Technology, Rolla, MO 65409, USA
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