Simplifying the expression
The previous expression can be reduced if uniform illumination,
a homogeneous sample and a known analyser transmission.
s(hn) is the X-ray cross-section
LA(g) is the Angular Asymmetry factor
NA is the Atom density
lM(EA) is the electron mean free path
G(EA) is effectively the Transmission Function (actually it is the
étendue which is proportional to the Tf, area analysed and
detector efficiency)
B is a normalisation constant