Angular momentum quantum electrodynamics

Eigenstates of a crystal, 725 Eigenvalues of quantum mechanical angular momentum, 396 Electrical filter response, 180 Electrical oscillatory circuit, 380 Electric charge operator, total, 542 Electrodynamics, quantum (see Quantum electrodynamics) Electromagnetic field, quantization of, 486, 560... 

This is due to the comparative weakness of the electromagnetic interaction, the theory of which contains a small dimensionless parameter (fine structure constant), by the powers of which the corresponding quantities can be expanded. The electron transition probability of the radiation of one photon, characterized by a definite value of angular momentum, in the first order of quantum-electrodynamical perturbation theory mdy be described as follows [53] (a.u.) ... 

In the Russell-Saunders approximation, considering electrostatic but neglecting electrodynamic effects, the energy levels of a given configuration can be assembled in (multiplet) terms characterized by the quantum numbers L of orbital angular momentum and 5 of the total spin. With Mulliken, we use capital letters for the quantum numbers of more-electron systems and lower case letters for the individual orbitals. If the gaseous atom or ion contains only one partly filled shell with only one electron (or 4/ 1 electrons, i.e., a hole in the filled n,l shell which may... 

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