How does atomic weight affect the attenuation of xrays?

Answer 1

Atomic weight influences the attenuation of X-rays primarily through its effect on the material's density and atomic number. Higher atomic weight materials, which typically have more protons and neutrons, tend to have a greater probability of interacting with X-rays, leading to increased attenuation. This is due to the photoelectric effect and Compton scattering, both of which are more pronounced in heavier elements. Consequently, materials with higher atomic weights are generally more effective at absorbing or scattering X-rays.