The tensor properties of are reflected in the polarization dependence of the DAFS signals. The EDAFS polarization dependence is analogous to that of EXAFS. For single-scattering EXAFS, the polarization dependence is , where specifies the direction from the absorbing atom to the back-scattering neighbor; the analogous dependence for EDAFS is . For multi-leg single-scattering paths, the EXAFS polarization dependence only depends on the two legs closest to the absorbing atom and is given by , where and specify the directions of the two closest legs; the analogous dependence for (nonmagnetic) EDAFS is given by .
The DANES and XANES polarization dependences are more complicated. The newest FEFF codes calculate the correct polarization dependence of the XANES matrix elements starting a little above threshold, and over the entire EXAFS region. These full FEFF calculations show that the simple polarization dependence works very well in the EXAFS region. The full polarization dependent FEFF codes for DANES and EDAFS are currently under development.