Bethe logarithms for hydrogen up to n=20, and approximations for two-electron atoms
copyright American Physical Society http://dx.doi.org/10.1103/PhysRevA.41.1243
Bethe logarithms accurate to 14 or 15 places to the right of the decimal are tabulated for all states of hydrogen up to n=20. Approximation methods for Rydberg states of two-electron atoms are discussed. © 1990 The American Physical Society.