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Close-coupling approach to Coulomb three-body problems.

Igor Bray1

  • 1Centre for Atomic, Molecular, and Surface Physics, School of Mathematical and Physical Sciences, Murdoch University, Murdoch 6150, Perth, Australia. I.Bray@murdoch.edu.au

Physical Review Letters
|January 7, 2003
PubMed
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The convergent close-coupling method accurately calculates electron collisions with hydrogen and helium, resolving previous experimental discrepancies in ionization.

Area of Science:

  • Atomic physics
  • Quantum mechanics
  • Electron-impact ionization

Background:

  • Electron-hydrogen ionization presents complex theoretical challenges.
  • Accurate calculations are needed for understanding atomic collisions.
  • Previous methods had discrepancies with experimental data.

Purpose of the Study:

  • To present the convergent close-coupling method.
  • To demonstrate its accuracy in electron-hydrogen ionization.
  • To extend its application to other Coulomb three-body problems.

Main Methods:

  • Utilizing the convergent close-coupling (CCC) method.
  • Applying CCC to electron collisions with hydrogen and helium.
  • Calculating helium double photoionization.

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Main Results:

  • The CCC method resolves discrepancies between theory and experiment.
  • Accurate calculations are achieved for electron-hydrogen ionization.
  • The method successfully models electron-helium collisions and helium double photoionization.

Conclusions:

  • The CCC method is a powerful tool for Coulomb three-body problems.
  • It provides accurate predictions for electron-atom ionization.
  • This advancement aids in understanding fundamental atomic processes.