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Title: Electron Capture and Electron Transport by Fast Ions Penetrating Solids: An Open Quantum System Approach with Sources and Sinks

Authors:
 [1];  [2];  [2];  [2];  [3];  [4];  [4];  [5];  [5];  [5]
  1. Institute of Physics, Karl-Franzens Universitat Graz
  2. ORNL
  3. Auburn University, Auburn, Alabama
  4. Institute for Theoretical Physics, Vienna University of Technology, Austria
  5. Institut des NanoSciences de Paris, Univ. Paris VI
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
948071
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review A; Journal Volume: 75; Journal Issue: 3
Country of Publication:
United States
Language:
English

Citation Formats

Seliger, M., Reinhold, Carlos O, Minami, Tatsuya, Schultz, David Robert, Pindzola, Michael S., Yoshida, S., Burgdorfer, J., Lamour, E., Rozet, J.-P., and Vernhet, D.. Electron Capture and Electron Transport by Fast Ions Penetrating Solids: An Open Quantum System Approach with Sources and Sinks. United States: N. p., 2007. Web. doi:10.1103/PhysRevA.75.032714.
Seliger, M., Reinhold, Carlos O, Minami, Tatsuya, Schultz, David Robert, Pindzola, Michael S., Yoshida, S., Burgdorfer, J., Lamour, E., Rozet, J.-P., & Vernhet, D.. Electron Capture and Electron Transport by Fast Ions Penetrating Solids: An Open Quantum System Approach with Sources and Sinks. United States. doi:10.1103/PhysRevA.75.032714.
Seliger, M., Reinhold, Carlos O, Minami, Tatsuya, Schultz, David Robert, Pindzola, Michael S., Yoshida, S., Burgdorfer, J., Lamour, E., Rozet, J.-P., and Vernhet, D.. Thu . "Electron Capture and Electron Transport by Fast Ions Penetrating Solids: An Open Quantum System Approach with Sources and Sinks". United States. doi:10.1103/PhysRevA.75.032714.
@article{osti_948071,
title = {Electron Capture and Electron Transport by Fast Ions Penetrating Solids: An Open Quantum System Approach with Sources and Sinks},
author = {Seliger, M. and Reinhold, Carlos O and Minami, Tatsuya and Schultz, David Robert and Pindzola, Michael S. and Yoshida, S. and Burgdorfer, J. and Lamour, E. and Rozet, J.-P. and Vernhet, D.},
abstractNote = {},
doi = {10.1103/PhysRevA.75.032714},
journal = {Physical Review A},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}
  • We present a joint theoretical and experimental study of the time evolution of electronic states of highly charged hydrogenic ions formed by capture during transmission through solids as they undergo multiple collisions and radiative decay. For this transport problem we have developed an inhomogeneous nonunitary Lindblad master equation that allows for a description of open quantum systems with both sinks (electron loss) and source (capture) present. We apply this theoretical framework to study transient coherences created in electron capture by 13.6 MeV/amu Ar 18+ ions transmitted through amorphous carbon foils and decoherence during subsequent interaction with the foil. In themore » limit of thin targets we can directly probe electron capture cross sections under single collision conditions, while for thicker targets we follow the partially coherent dynamics of the open quantum system in interaction with the solid as a function of interaction time. The calculated results are in close agreement with experimental data obtained at the LISE facility in GANIL. Photon intensities from excited argon ions were determined through high resolution x-ray spectroscopy in which individual fine structure components were resolved. Measurements were performed for a wide range of carbon foil thickness to study the time development of the excited state populations.« less
  • We present a joint theoretical and experimental study of the time evolution of electronic states of highly charged hydrogenic ions formed by capture during transmission through solids as they undergo multiple collisions and radiative decay. For this transport problem we have developed an inhomogeneous nonunitary Lindblad master equation that allows for a description of open quantum systems with both sinks (electron loss) and source (capture) present. We apply this theoretical framework to study transient coherences created in electron capture by 13.6 MeV/amu Ar{sup 18+} ions transmitted through amorphous carbon foils and decoherence during subsequent interaction with the foil. In themore » limit of thin targets we can directly probe electron capture cross sections under single collision conditions, while for thicker targets we follow the partially coherent dynamics of the open quantum system in interaction with the solid as a function of interaction time. The calculated results are in close agreement with experimental data obtained at the LISE facility in GANIL. Photon intensities from excited argon ions were determined through high resolution x-ray spectroscopy in which individual fine structure components were resolved. Measurements were performed for a wide range of carbon foil thickness to study the time development of the excited state populations.« less
  • We introduce a distorted wave method to calculate the nonlinear excitation effects occurring when a fast bare ion penetrates a free-electron gas. The central scheme of this work is to replace the undistorted plane waves leading to the Lindhard dielectric response function (or random phase approximation) by Coulomb waves with an effective charge. This impulse-type approximation is valid for velocities larger than the Fermi velocity. Stopping and mean free path are presented for impact of bare multicharged ions on aluminum free-electron gas. The Barkas effect is theoretically found, i.e., negative heavy particles lose energy at the lower rate than positivemore » particles of the same velocity do. As the projectile charge increases, the single differential cross section per unit energy presents two effects: the plasmon peak sharpens and the binary peak starts to be increasingly noticeable.« less