Lamb shift


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Related to Lamb shift: fine structure, hyperfine structure

Lamb shift

[′lam ¦shift]
(atomic physics)
A small shift in the energy levels of a hydrogen atom, and of hydrogenlike ions, from those predicted by the Dirac electron theory, in accord with principles of quantum electrodynamics.
References in periodicals archive ?
It has been observed that the radius of the proton, as determined by the Lamb shift, is apparently 4% less when measured using an orbiting muon instead of an electron.
Immediately following the Shelter Island conference Julian Schwinger set to work to develop a Lorentz-invariant formulation of QED--a formulation which is completely consistent with the requirements of special relativity--and to calculate a prediction for the Lamb shift from first principles.
The researchers found execellent agreement between their calculated value and theoretical predictions of the Lamb shift.
The Lamb shift depends on electromagnetic forces; planetary precession depends on gravitation.