Atomic electron binding energies

Recent experimental atomic electron binding-energy determinations for the gaseous or vapor and condensed elemental states are compared in Table I for elements with Z < 31 and for a number of levels in several heavier elements. Also entered for comparison are the corresponding atomic electron binding-energy values from Table II, an extension of the original Bearden and Burr tabulation of electron binding-energy determinations for the elements in the condensed state. From the comparison one can determine which of the Table II values are for the elemental state. Chemical and physical shifts in atomic electron binding energies are briefly considered. Table II presents for elements of atomic number Z = 1 to Z = 106 the atomic electron binding energies for the K-, L-, M-, and N-shells, and for the O1–5- and P1–3-subshells. Comparisons of these values with the theoretical values of Huang et al. are presented in graphical form. Interpolation and extrapolation procedures are employed to fill in missing electron binding-energy values. In arriving at these account has been taken of the results of Bearden and Burr, most of them based on least-squares adjustment of overdetermined values, and of new measurements published up to January 1978 in the fields of x-ray emission and absorption spectrometry and of photo- and Auger-electron spectrometry.