# Property of $Cu$ so that it is used as target in in X-ray diffraction (XRD)?

Why only $Cu$ is used as target element in X-ray diffraction (XRD)? Why not other elements? And which rays has high intensity $k_\alpha$ or $k_\beta$?

• Apart from any x-ray reasons, Cu is cheap, easily machined, and has a high thermal conductivity so it can be cooled easily - you don't want you x-ray source trying to turn into an e-beam evaporation system! – Jon Custer Nov 13 '14 at 14:22
• nice discussion here: pd.chem.ucl.ac.uk/pdnn/inst1/anode.htm – DavePhD Nov 13 '14 at 18:20