| This database provides theoretical values of energy levels of hydrogen and
deuterium for principle quantum numbers n = 1 to 200 and all
allowed orbital angular momenta l and total angular
momenta j. The values are based on current knowledge of the
revelant theoretical contributions including relativistic, quantum
electrodynamic, recoil, and nuclear size effects. Hyperfine structure effects
are not included. Contributions that are only known for low
n states have been extrapolated to highly-excited states.
Fundamental constants used in the calculations are taken from the CODATA 2002
least-squares adjustment and can be found at the NIST
Fundamental Physical Constants
Web site. The changes that would result from using the 2006 CODATA recommended values of the fundamental constants are insignificant for the theoretical predictions. Quoted uncertainties take into account uncertainties in the
theoretical calculations, uncertainties in the fundamental constants, and
covariances between the various contributions and input parameters.
This interactive database allows a user to obtain individual energy levels and
transition frequencies as well as tables of frequencies. Given the volume of
the possible data, this Web site is designed to calculate the values on
request. |
