Coincidence Studies of Electron and Photon Impact Ionization

  • Colm T. Whelan
  • H. R. J. Walters

Part of the Physics of Atoms and Molecules book series (PAMO)

Table of contents

  1. Front Matter
    Pages i-ix
  2. Recent Absolute (e,2e) Measurements on Atomic Hydrogen and Helium at Low and Intermediate Energies

  3. Second Born Calculations of (e–2e) Cross Sections at Low Energy Using a Pseudostate Set

    1. F. Rouet, G. Nguyen Vien, R. J. Tweed, O. Robaux, J. Langlois
      Pages 11-20
  4. Excitation — Ionization and Excitation — Autoionization of Helium

    1. Pascale J. Marchalant, Colm T. Whelan, H. R. J. Walters
      Pages 21-43
  5. An Analytical Approach to Resonant and Direct Fragmentation of Many-Body Coulomb Systems

  6. Ionization Dynamics and Exchange Effects in Pure Three-Body Coulomb Scattering

  7. Analysis of Integrated Cross Sections and Spin Asymmetries for the Electron-Impact Ionization of One- and Two-Electron Atomic Systems

  8. Double Ionization Mechanisms from Triple Coincidence Experiments

    1. A. Lahmam-Bennani, A. Duguet, B. El Marji, C. Schröter, L. Spielberger
      Pages 71-75
  9. Double Ionization of Helium by Electron Impact: A Study of the Two-Step Mechanism

    1. Claude Dal Cappello, Rachid El M’Khanter, Pascal Lamy
      Pages 77-83
  10. Partitioning of Momentum in Electron-Impact Double Ionization

    1. John H. Moore, Michael J. Ford, Michael A. Coplan, John W. Cooper, John P. Doering
      Pages 85-92
  11. 5DCS and 4DCS Calculations for Symmetric (e,3e) Impact Ionization

    1. Yuri V. Popov, Claude Dal Cappello, Konstantin Kuzakov
      Pages 93-99
  12. Exact and Approximate Methods of the Rigorous Coulomb Scattering Theory

    1. Igor V. Farnakeev, Vladimir L. Shablov, Yuri V. Popov
      Pages 101-108
  13. Strong and Weak Statements in the Theory of Dipolar (e,2e) Impact Ionization

    1. Yuri V. Popov, Victor A. Knyr, Leonid V. Stotland, Viacheslav V. Nasyrov
      Pages 109-113
  14. The Triple Differential Cross Sections for (γ,2e) in Helium at Intermediate Energies

    1. J. Wightman, T. J. Reddish, S. Cvejanovic
      Pages 115-119
  15. Total and Single Differential Cross Sections for He Double Photoionization Calculated by the CCC Method

  16. From (γ,2e) to (γ,eR): Kinematically Complete Experiments with Coltrims

    1. T. Vogt, R. Dörner, O. Jagutzki, C. L. Cocke, J. Feagin, M. Jung et al.
      Pages 127-136
  17. Angle Resolved Electron Energy Loss Study on the Inner Shell Excited States of Ne

    1. C. D. Schröter, L. Avaldi, R. Camilloni, G. Stefan
      Pages 137-143
  18. Circular Dichroism in Double-Photoionization of Helium Studied by Electron Time-Of-Flight Coincidence Spectroscopy

    1. J. Viefhaus, L. Avaldi, G. Snell, M. Wiedenhöft, R. Hentges, A. Rüdel et al.
      Pages 145-153
  19. Interference Effects in Argon Auger Coincidence Spectra

    1. D. K. Waterhouse, J. F. Williams
      Pages 155-162
  20. Triple Differential Cross Sections for Electron Impact Ionization of Argon between 50 eV and 215.8 eV

    1. Stéphane Rioual, Bruno Rouvellou, Jochen Röder, Amédée Pochat
      Pages 163-167

About this book


The great advantage of coincidence measurements is that by suitable choice of the kinematical and geometrical arrangement one may probe delicate physical effects which would be swamped in less differential experiments. The measurement of the triple dif­ ferential and higher-order cross sections presents enormous technical difficulties, but refined experiments of this type provide an insight into the subtleties of the scattering process and offer a welcome, if severe, test of the available theoretical models. The last few years have been an exciting time to work in the field and much has been learned. Profound insights have been gleaned into the basic Coulomb few body problem in atomic physics: the experimental study of the fundamental (e,2e) processes on hydrogen and helium targets continues to add to our knowledge and indeed to challenge the best of our theoretical models; significant advances have been made in the understanding of the "double excitation problem," that is the study of ionization processes with two active target electrons: important measurements of (e,3e), (,),,2e), excitation-ionization and excitation autoionization have been reported and strides have been made in their theoretical description; the longstanding discrepancies between theory and experiment for relativistic (e,2e) processes were resolved, spin dependent effects predicted and ob­ served and the first successful coincidence experiments on surfaces and thin films were announced. Theory and experiment have advanced in close consort. The papers pre­ sented here cover the whole gambit of research in the field. Much has been achieved but much remains to be done.


Cross section autoionization scattering scattering theory two-electron atom

Editors and affiliations

  • Colm T. Whelan
    • 1
  • H. R. J. Walters
    • 2
  1. 1.University of CambridgeCambridgeEngland
  2. 2.The Queen’s University of BelfastBelfastNorthern Ireland

Bibliographic information

  • DOI
  • Copyright Information Springer-Verlag US 1997
  • Publisher Name Springer, Boston, MA
  • eBook Packages Springer Book Archive
  • Print ISBN 978-1-4757-9753-4
  • Online ISBN 978-1-4757-9751-0
  • About this book