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Title: Double ionization of helium by highly-charged-ion impact analyzed within the frozen-correlation approximation

Abstract

We apply the frozen-correlation approximation (FCA) to analyze double ionization of helium by energetic highly charged ions. In this model the double ionization amplitude is represented in terms of single ionization amplitudes, which we evaluate within the continuum distorted wave-eikonal initial state (CDW-EIS) approach. Correlation effects are incorporated in the initial and final states, but are neglected during the time the collision process takes place. We implement the FCA using the Monte Carlo event generator technique, which allows us to generate theoretical event files and to compare theory and experiment using the same analysis tools. The comparison with previous theoretical results and with experimental data demonstrates, on the one hand, the validity of our earlier simple models to account for higher-order mechanisms, and, on the other hand, the robustness of the FCA.

Authors:
; ;  [1];  [2];  [3]
  1. ICFO-Institut de Ciences Fotoniques, 08860 Castelldefels (Barcelona) (Spain)
  2. (Canada)
  3. (United States)
Publication Date:
OSTI Identifier:
22072232
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; AMPLITUDES; CORRELATIONS; DISTORTED WAVE THEORY; EIKONAL APPROXIMATION; HELIUM; IONIZATION; IONS; MONTE CARLO METHOD

Citation Formats

Ciappina, M. F., Kirchner, T., Schulz, M., Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, and Department of Physics and LAMOR, Missouri University of Science and Technology, Rolla, MO 65409. Double ionization of helium by highly-charged-ion impact analyzed within the frozen-correlation approximation. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.034701.
Ciappina, M. F., Kirchner, T., Schulz, M., Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, & Department of Physics and LAMOR, Missouri University of Science and Technology, Rolla, MO 65409. Double ionization of helium by highly-charged-ion impact analyzed within the frozen-correlation approximation. United States. doi:10.1103/PHYSREVA.84.034701.
Ciappina, M. F., Kirchner, T., Schulz, M., Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, and Department of Physics and LAMOR, Missouri University of Science and Technology, Rolla, MO 65409. Thu . "Double ionization of helium by highly-charged-ion impact analyzed within the frozen-correlation approximation". United States. doi:10.1103/PHYSREVA.84.034701.
@article{osti_22072232,
title = {Double ionization of helium by highly-charged-ion impact analyzed within the frozen-correlation approximation},
author = {Ciappina, M. F. and Kirchner, T. and Schulz, M. and Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3 and Department of Physics and LAMOR, Missouri University of Science and Technology, Rolla, MO 65409},
abstractNote = {We apply the frozen-correlation approximation (FCA) to analyze double ionization of helium by energetic highly charged ions. In this model the double ionization amplitude is represented in terms of single ionization amplitudes, which we evaluate within the continuum distorted wave-eikonal initial state (CDW-EIS) approach. Correlation effects are incorporated in the initial and final states, but are neglected during the time the collision process takes place. We implement the FCA using the Monte Carlo event generator technique, which allows us to generate theoretical event files and to compare theory and experiment using the same analysis tools. The comparison with previous theoretical results and with experimental data demonstrates, on the one hand, the validity of our earlier simple models to account for higher-order mechanisms, and, on the other hand, the robustness of the FCA.},
doi = {10.1103/PHYSREVA.84.034701},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}