Book ChapterDOI
Quantum Mechanics of One- and Two-Electron Atoms
Hans A. Bethe,Edwin E. Salpeter +1 more
- Vol. 7, pp 88-436
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TLDR
The theory of atoms with one or two electrons is the simplest and most completely treated field of application of quantum mechanics as mentioned in this paper, and it is one of the simplest fields of application for quantum mechanics.Abstract:
One of the simplest, and most completely treated, fields of application of quantum mechanics is the theory of atoms with one or two electrons For hydrogen and the analcgous ions He+, Li++, etc, the calculations can be performed exactly, both in Schrodinger’s nonrelativistic wave mechanics and in Dirac’s relativistic theory of the electron More specifically, the calculations are exact for a single electron in a fixed Coulomb potential Hydrogen-like atoms thus furnish an excellent way of testing the validity of quantum mechanics For such atoms the correction terms due to the motion and structure of atomic nuclei and due to quantum electrodynamic effects are small and can be calculated with high accuracy Since the energy levels of hydrogen and similar atoms can be investigated experimentally to an astounding degree of accuracy, some accurate tests of the validity of quantum electrodynamics are also possible Finally, the theory of such atoms in an external electric or magnetic field has also been developed in detail and compared with experimentread more
Citations
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Journal ArticleDOI
Intensities of Crystal Spectra of Rare‐Earth Ions
TL;DR: In this article, the transition probability of pure-electronic electric dipole transitions between levels of the 4-fluorescence configuration perturbed by a static crystalline field is treated.
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Atomic subshell photoionization cross sections and asymmetry parameters: 1 ⩽ Z ⩽ 103
TL;DR: In this article, the Hartree-Fock-Slater one-electron central potential model (dipole approximation) was used to calculate atomic subshell photoionization cross sections and asymmetry parameters.
Journal ArticleDOI
On the Absorption of X‐Rays in the Interstellar Medium
J. Wilms,A. Allen,Richard McCray +2 more
TL;DR: In this paper, an improved model for the absorption of X-rays in the interstellar medium (ISM) is presented for use with data from future X-ray missions with larger effective areas and increased energy resolution such as Chandra and the X-Ray Multiple Mirror mission.
Journal ArticleDOI
Intense few-cycle laser fields: Frontiers of nonlinear optics
Thomas Brabec,Ferenc Krausz +1 more
TL;DR: In this article, the authors present the landmarks of the 30-odd-year evolution of ultrashort-pulse laser physics and technology culminating in the generation of intense few-cycle light pulses and discuss the impact of these pulses on high-field physics.
Journal ArticleDOI
Quantum electrodynamical corrections to the fine structure of helium
Marvin Douglas,Norman M. Kroll +1 more
TL;DR: In this article, order α6mc2 corrections to the fine structure splitting of the He4 atom were investigated based on the covariant Bethe-Salpeter equation including external potential to take account of the nuclear Coulomb field.
References
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Book
A Course of Modern Analysis
TL;DR: The volume now gives a somewhat exhaustive account of the various ramifications of the subject, which are set out in an attractive manner and should become indispensable, not only as a textbook for advanced students, but as a work of reference to those whose aim is to extend the knowledge of analysis.
Book
The theory of atomic collisions
TL;DR: The perturbation theory has been applied to many-body problems and applications, such as electron collisions with atoms, collisions between atomic systems, nuclear collisions, and certain aspects of two-body systems under relativistic collisions.