X‐Ray Study of Proton‐Induced Disorder in Cu3Au

Measurement of fundamental and superlattice x‐ray diffraction lines as a function of integrated proton‐bombardment current has been used to determine induced disorder in the surface layers of fully ordered polycrystalline targets of Cu3Au. It is shown that a proton range for induced disorder and the number of disordered atoms created per proton can be inferred from the data.