Databases for X-ray Absorption and XAFS measurements

For X-ray properties of the elements, including absorption cross-sections, tools for calculating absorption lengths, mirror reflectivities, monochromator Darwin widths and more, see

X-ray Data for the Elements

Other databases of X-ray absorption and scattering properties of the elements are at

Periodic Table of X-ray Absorption and Emission Energies

Poster-sized Periodic Table of X-ray Absorption Edge energies and X-ray emission line energies are available at These display the energies of the hard X-ray absorption edges (K, L1, L2, L3, M5) and the main K, L, and M emission lines, as well as the electronic configuration and most common oxidation states for each element.

The table is generated using X-ray data from W. T. Elam, B. D. Ravel and J. R. Sieber, Radiation Physics and Chemistry 63 (2), pp. 121–128 (2002) (DOI:10.1016/S0969-806X(01)00227-4). The code used to generate this Poster is freely available as part of the XrayDB python module and database.


Reference data

Multiple Electron Excitations