The extremely precise extraction of the proton radius obtained by Pohl et al. from the
measured energy difference between the 2 P and 2 S states of muonic hydrogen disagrees …

This paper gives the 2002 self-consistent set of values of the basic constants and conversion
factors of physics and chemistry recommended by the Committee on Data for Science and …

The proton is the primary building block of the visible Universe, but many of its properties—
such as its charge radius and its anomalous magnetic moment—are not well understood …

1.1. Background This article reports work carried out under the auspices of the Committee
on Data for Science and Technology (CODATA) Task Group on Fundamental Constants. 1 It …

1.1. Background This paper gives the complete 2006 CODATA self-consistent set of
recommended values of the fundamental physical constants and describes in detail the …

Quantum electrodynamics (QED) is the first successful and still the most successful quantum
field theory. Simple atoms, being essentially QED systems, allow highly accurate theoretical …

We perform ab initio QED calculations of energy levels for the n= 1 and n= 2 states of He-like
ions with the nuclear charge in the range Z= 12–100. The complete set of two-electron QED …

Theoretical energy levels of the n= 1 and n= 2 states of hydrogen-like atoms with the nuclear
charge numbers 1≤ Z≤ 110 are tabulated. The tabulation is based on ab initio quantum …

The current status of bound state quantum electrodynamics calculations of transition
energies for few-electron ions is reviewed. Evaluation of one and two body QED correction …

Theoretical calculations of the Lamb shift provide the basis required for the determination of
the Rydberg constant from spectroscopic measurements in hydrogen. The recent high …