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Title: Ionization in Fast Atom-Atom Collisions: The Influence and Scaling Behavior of Electron-Electron and Electron-Nuclear Interactions

Abstract

We report cross sections for ionization of He coincident with electron loss from He, Li, C, O, and Ne pro jectiles. For He, Li, C, and O pro jectiles, the cross sections were measured directly, while the Ne cross sections were obtained by transforming results for He pro jectiles colliding with Ne. We find that, at energies of about 100-500 keV/u, neutral pro jectiles can ionize a He target almost as effectively as a charged pro jectile. The contribution to ionization due to electron-electron interactions is found to scale with the number of available pro jectile electrons. Comparing ionization by the bound electrons on projectiles to ionization by free electrons, we find the cross sections for ionization by bound electrons are systematically smaller than those for free electrons.

Authors:
 [1];  [2];  [3];  [4];  [4];  [4];  [4];  [4]
  1. University of South Alabama, Mobile
  2. University of Missouri, Rolla
  3. Georgia State University, Atlanta
  4. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931105
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review A; Journal Volume: 76; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 74 ATOMIC AND MOLECULAR PHYSICS; ATOM-ATOM COLLISIONS; CROSS SECTIONS; ELECTRON LOSS; ELECTRON-ELECTRON INTERACTIONS; ELECTRONS; IONIZATION; PROJECTILES; TARGETS

Citation Formats

Sanders, Justin M., DuBois, R. D., Manson, S. T., Datz, Sheldon, Deveney, Edward, Krause, Herbert F, Shinpaugh, Jefferson, and Vane, C Randy. Ionization in Fast Atom-Atom Collisions: The Influence and Scaling Behavior of Electron-Electron and Electron-Nuclear Interactions. United States: N. p., 2007. Web. doi:10.1103/PhysRevA.76.062710.
Sanders, Justin M., DuBois, R. D., Manson, S. T., Datz, Sheldon, Deveney, Edward, Krause, Herbert F, Shinpaugh, Jefferson, & Vane, C Randy. Ionization in Fast Atom-Atom Collisions: The Influence and Scaling Behavior of Electron-Electron and Electron-Nuclear Interactions. United States. doi:10.1103/PhysRevA.76.062710.
Sanders, Justin M., DuBois, R. D., Manson, S. T., Datz, Sheldon, Deveney, Edward, Krause, Herbert F, Shinpaugh, Jefferson, and Vane, C Randy. Mon . "Ionization in Fast Atom-Atom Collisions: The Influence and Scaling Behavior of Electron-Electron and Electron-Nuclear Interactions". United States. doi:10.1103/PhysRevA.76.062710.
@article{osti_931105,
title = {Ionization in Fast Atom-Atom Collisions: The Influence and Scaling Behavior of Electron-Electron and Electron-Nuclear Interactions},
author = {Sanders, Justin M. and DuBois, R. D. and Manson, S. T. and Datz, Sheldon and Deveney, Edward and Krause, Herbert F and Shinpaugh, Jefferson and Vane, C Randy},
abstractNote = {We report cross sections for ionization of He coincident with electron loss from He, Li, C, O, and Ne pro jectiles. For He, Li, C, and O pro jectiles, the cross sections were measured directly, while the Ne cross sections were obtained by transforming results for He pro jectiles colliding with Ne. We find that, at energies of about 100-500 keV/u, neutral pro jectiles can ionize a He target almost as effectively as a charged pro jectile. The contribution to ionization due to electron-electron interactions is found to scale with the number of available pro jectile electrons. Comparing ionization by the bound electrons on projectiles to ionization by free electrons, we find the cross sections for ionization by bound electrons are systematically smaller than those for free electrons.},
doi = {10.1103/PhysRevA.76.062710},
journal = {Physical Review A},
number = 6,
volume = 76,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}