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Kinematically Complete Study of Electron Transfer and Rearrangement Processes in Slow Ar¹⁶⁺-Ne Collisions
Physical Review A - Atomic, Molecular, and Optical Physics
  • Yingli Xue
  • Rainer Ginzel
  • Achim Krauss
  • Sven Bernitt
  • Markus S. Schoffler
  • Kai Uwe Kuhnel
  • Jose R. Crespo Lopez-Urrutia
  • Robert Moshammer
  • Xiaohong Cai
  • Joachim Hermann Ullrich
  • Daniel Fischer, Missouri University of Science and Technology
Abstract

The complete kinematics of single- and double-electron capture from neon to Ar16+ was measured with a reaction microscope at a projectile energy of 3.2 keV/u (velocity vp=0.36 a.u.). Not only the change of the electronic binding energies (the Q value) and the projectile scattering angles, but also (in the case of auto-ionization) the three-dimensional momentum vectors of the emitted electrons were determined. For single-electron capture, the Q-value spectrum shows strong population of both n=7 and 8 states on the projectile, and weak contributions to n=6 and 9 are also observed. In the case of double-electron capture, auto-ionizing double capture (ADC) dominates and the populations of (n,n')=(5,7),(6,6),(6,7) and (6,8) are observed, while true double capture (TDC) populates the (5,7) state and asymmetric states of (5,n') with n'>10. The experimental cross sections for Auger decay with the electron energy Ee plotted as a function of the Q value suggest the occurrence of target excitation accompanying the population of configurations (5,7) and (6,6). No essential difference is found in the differential cross sections for ADC and TDC, and the angular distributions suggest that two-step processes dominate the double capture.

Department(s)
Physics
Keywords and Phrases
  • Binding Energy,
  • Electron Energy Levels,
  • Electron Transport Properties,
  • Projectiles,
  • Differential Cross Section,
  • Electron Transfer,
  • Projectile Energy,
  • Reaction Microscopes,
  • Rearrangement Process,
  • Scattering Angles,
  • Single Electron Capture,
  • Analog To Digital Conversion
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2014 American Physical Society (APS), All rights reserved.
Publication Date
11-1-2014
Publication Date
01 Nov 2014
Disciplines
Citation Information
Yingli Xue, Rainer Ginzel, Achim Krauss, Sven Bernitt, et al.. "Kinematically Complete Study of Electron Transfer and Rearrangement Processes in Slow Ar¹⁶⁺-Ne Collisions" Physical Review A - Atomic, Molecular, and Optical Physics Vol. 90 Iss. 5 (2014) p. 052720-1 - 052720-7 ISSN: 1050-2947
Available at: http://works.bepress.com/daniel-fischer/42/