VALIDATION. “Scattering data measured for molybdenum, graphite, calcite, and many other target materials are in accord with this theoretical result.”
https://opentextbc.ca/universityphysicsv3openstax/chapter/the-compton-effect/#:~:text=The%20Compton%20effect%20is%20the,wavelength%20of%20the%20incident%20radiation