K and L-shell X-ray production cross sections for 50–250 keV proton impact on elements with Z = 26–30

The K and L-shell X-ray production cross sections of Fe, Co, Ni, Cu and Zn elements are measured by 50–250 keV proton impact. The results are compared with Binary Encounter Approximation (BEA), Plane Wave Born Approximation (PWBA) and Energy loss Coulomb repulsion Perturbed Stationary State Relativistic (ECPSSR) theoretical predictions, as well as with experimental data of other authors. The ECPSSR theory agrees well with the K-shell cross section, but it overestimates the L-shell cross section by a maximum factor of about 7. The ECPSSR theory predicts a good trend to the production cross section ratio of the L to K-shell X-ray.