Where can i get the cross section of photon incident atomic and the related standard error?

where can i get the cross section of photon incident atomic and the related standard error?
thanks!

Which cross section? In general, FLUKA is not meant to extract basic physics ingredients that you can easily find elsewhere, e.g. here.

@ceruttif , thanks! i want the cross section of photon atomic such as photoelectric effect, Compton scattering, Electron pair effect, and the standard error of the cross section.

As mentioned, FLUKA is not a database for integral cross section extraction. Look rather at IAEA data.

@ceruttif , thanks, i had extracted the cross section from related .endf file, but not the standard error of cross section.