chapter  6
62 Pages

X-Ray Absorption Spectroscopy

A photon that enters a solid can be scattered or it can be annihilated in the photo electric effect. All other photons will be transmitted and will leave the sample without change in the forward direction. In XAS, the absorption of x-rays by a sample is measured. The intensity of the beam before the sample I0 and the intensity of the transmitted beam I are measured.