Figure 1
Dependence of the cross sections for photoelectric absorption, coherent scattering and incoherent scattering on the incident photon energy. (a) Absolute values, (b) relative contributions. The values were calculated using the XCOM server (https://physics.nist.gov/PhysRefData/Xcom/Text/XCOM.html
) at NIST (Gaithersburg, MD, USA) based on the composition of an average protein crystal (9% H, 27% C, 8% N, 55% O and 1% S). |