x-ray absorption data for the elements

 Xray::Absorption supports access to X-ray absorption data. It is designed
 to be a transparent interface to absorption data from a variety of
 sources. Currently, the only sources of data are the 1969 McMaster
 tables, the 1999 Elam tables, the 1993 Henke tables, and the 1995
 Chantler tables. The Brennan-Cowen implementation of the
 Cromer-Liberman tables is available as a drop-on-top addition to this
 package. More resources can be added easily.