Xraytrace documentation

0 0 1 0 0 0
1 99 Ag 0 0
2 99 Si 0 0
3 99 Cr 0 0

If we use the database material (type = 99), we have two parameters more, that can be used to force the system to use different values of attenuation and density than those calculated from the Xraylib database. A second option how to override the density of the material is to use the following directive in the main parameter file:

OVERRIDE_XRAYLIB_DENSITY
index value

which uses the supplied density for the particular index, but calculates everything using Xraylib as usual based on this density.