Journal ArticleDOI
Correlations of two excited electrons
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In this article, the symmetry of the Schrodinger equation and its eigenfunctions are viewed and found to be important for the mechanics of the electron pair and radial correlations are more significant for the pair than the angular correlations.Abstract:
Advances over the last twenty years are reported, with the emphasis on describing correlations through the distribution of an electron pair's wavefunction in its configuration space. The symmetry of the Schrodinger equation and its eigenfunctions are thus viewed and found to be important. The radial correlations are more significant for the mechanics of the pair than the angular correlations. Connections with other approaches to the subject are described. Earlier studies concerning doubly excited helium and the hydrogen negative ion are related to Wannier's threshold law (1953) for ionisation by electron collision, but these two subjects are not yet fully connected. Recent studies on the alkaline earths and helium negative ion are described and viewed as a prelude to a renewed analysis and interpretation of the optical spectra and electron collisions for atoms with partially filled valence shells, which afford ample opportunity for the manifestation of strong correlations.read more
Citations
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Journal ArticleDOI
The method of complex coordinate rotation and its applications to atomic collision processes
TL;DR: In this article, the theoretical and computational aspects of complex coordinate rotation are discussed, with emphasis on atomic resonance calculations, and applications to other areas such as molecular resonances, Stark effect in atoms, photoionization cross section calculations, etc., are also discussed.
Journal ArticleDOI
Photoionization of atoms using synchrotron radiation
TL;DR: A comprehensive review of photoionization of rare gas atoms using monochromatized synchrotron radiation is given in this paper, with a focus on the general experimental and theoretical background.
Journal ArticleDOI
Atomic negative-ion resonances
Stephen Buckman,Charles W. Clark +1 more
TL;DR: A review of experimental and theoretical approaches to the study of negative-ion resonances is given together with a consideration of the various schemes that are used for their classification in this paper, where the authors also highlight regularities in their behavior both within groups of the periodic table and along isoionic sequences.
Journal ArticleDOI
Hyperspherical coordinate approach to atomic and other Coulombic three-body systems
TL;DR: In this article, the application of hyperspherical coordinates in a unified treatment of bound states and resonances of two-electron atomic systems and other general Coulomb three-body systems is reviewed.
Journal ArticleDOI
The theory of two-electron atoms: between ground state and complete fragmentation
TL;DR: A review of the evolution of the understanding of correlated two-electron dynamics and its importance for doubly excited resonance states is presented in this article, with an emphasis on the concepts introduced.
References
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Book
The theory of atomic structure and spectra
TL;DR: In this article, the Slater-Condon theory of atomic structure and spectra is combined with a coherent set of closed-form equations suitable both for computer calculations on cases of arbitrary complexity and for hand calculations for very simple cases.
Journal ArticleDOI
Tunneling between superconductors
Vinay Ambegaokar,Alexis Baratoff +1 more
TL;DR: In this article, a simple prediction for the temperature dependence of the d-c supercurrent is shown to follow from the theory of the thermodynamic Green's function, which allows generalization to superconductors with strong electron-phonon coupling.
Journal ArticleDOI
Spectral Distribution of Atomic Oscillator Strengths
TL;DR: In this paper, the spectrum of oscillator strength for neutral atoms in their ground states is surveyed with particular regard to recent progress in the far uv-soft x-ray range and to the theoretical interpretation of data from experiments and from numerical calculations.
Journal ArticleDOI
Lifetime Matrix in Collision Theory
TL;DR: The lifetime of a collision is defined as the difference between the time the particles spend within a distance $R$ of each other and the time they would have spent there in the absence of the interaction.
Journal ArticleDOI
Resonances in Electron Impact on Diatomic Molecules
TL;DR: In this article, the energies, configuration, and other properties of resonances (also called "compound states" and "temporary negative ions") in diatomic molecules are presented in the form of tables and energy level diagrams.
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