X-ray scattering factors of metallic aluminum calculated from a self-consistent x-ray attenuation data base.

Abstract

The current best-fit tabulation of the optical absorption of aluminum is modified to include K-edge extended x-ray-absorption fine structure and other near-edge structures. The rationale used in choosing the most consistent K-edge data is discussed. Sum rules and comparisons with optical and electron-energy-loss experiments are used to check the consistency of the modifications to the absorption spectrum. The forward scattering factor is calculated from the modified spectrum and a significant difference in ${\mathit{f}}_{1}$(\ensuremath{\omega}) is found between the original and the modified data sets near the K edge. This is largely due to resonant effects in the near-edge absorption structure of aluminum.