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Related Experiment Videos

Average electron radii in many-electron atoms.

Toshikatsu Koga1

  • 1Department of Applied Chemistry, Muroran Institute of Technology, Muroran, Hokkaido 050-8585, Japan.

The Journal of Chemical Physics
|August 12, 2004
PubMed
Summary

Researchers explored electron radii in atoms, finding that explicit electron interactions split the average radius into inner and outer components. This study details these radii for many-electron atoms using Hartree-Fock calculations.

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Area of Science:

  • Atomic Physics
  • Quantum Chemistry

Background:

  • The average electron radius (r) simplifies many-electron atoms by averaging interelectronic interactions.
  • Explicitly considering electron-electron interactions necessitates a more nuanced description of electron distribution.

Purpose of the Study:

  • To systematically examine the inner radius r(<) and outer radius r(>) for atoms Helium (He) through Lawrencium (Lr) in their ground states.
  • To investigate the impact of electron correlations on these distinct radii, using the He atom and its isoelectronic ions as a test case.

Main Methods:

  • Utilizing the Hartree-Fock limit method for calculations.
  • Systematic examination of electron radii across a range of elements.

Main Results:

  • The average electron radius (r) differentiates into inner radius r(<) and outer radius r(>) when electron-electron interactions are explicitly included.
  • Calculations were performed for 102 atoms from He to Lr in their ground states.

Conclusions:

  • The distinction between inner and outer electron radii provides a more accurate representation of electron distribution in many-electron systems.
  • Electron correlations significantly influence the behavior of both inner and outer electron radii.

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