Atomic photoeffect cross sections for beryllium, carbon, silicon and copper from 5 to 20 keV

Atomic photoeffect cross sections for Be, C, Si, and Cu have been derived from experimental mass attenuation coefficients in the X-ray range. The data are compared with theoretical photoabsorption calculations by Scofield (1973) and others. Systematic trends suggest that the Scofield theoretical values with and without the Hartree-Slater to Hartree-Fock renormalisation can be used as lower and upper limits of the experimental photoeffect cross sections.