EXAFS Cumulant Expansion

k = momentum of photoelectron

j = index for scattering atom

?(k) = normalized absorption

F = amplitude factor for scatterer

? = phase shift for scatterer

l = mean free path of photoelectron

P(rj) = pair distribution function

So2 = correction for multi-electron processes

Sources:

E.D. Crozier, in EXAFS Spectroscopy, edited by B.K. Teo and T.C. Joy (Plenum, New York), Chapter 6 (1981).

M. Newville, Documentation for FEFFIT 2.32 (University of Washington), Chapter 6 (1995).

roj= mean absorber-scatterer distance