FF2X: XAFS Spectrum

The module ff2x constructs the XAS spectrum $\chi(k)$ or $\mu$ using the XAFS parameters from one or more paths, including any FMS contributions. Single and multiple scattering Debye-Waller factors are calculated using, for example, the correlated Debye model. Output from this module is the total XAFS spectrum and optionally, the contribution to the XAFS from each path individually. Numerous options for filtering, Debye-Waller factors, and other corrections are available.