This paper present new results about x-ray emission from porous materials obtained from Monte Carlo simulations. This is an update from the results which have been presented for the first time last year. In particular, the absorption correction is now simulated in the same way as the electron scattering. In the results presented last year, x-ray absorption was calculated with the integration of the φ(ρz) curves via the usual equation :

where I is the intensity emitted from the porous specimen, I0 is the intensity emitted from a thin foil with no porosity, x is the mass absorption coefficient times the cosine of the take off angle, z is the depth in the specimen and ρ is the density of the porous materials. Since the density term does not include the effect of the size of the pores, integration of this equation will give wrong results when the size of the pores are big relative to the electron range.