A comparison of simulated and experimental displacement cascade dimensions in Cu₃Au

Abstract

The maximum transverse dimensions of computer-simulated displacement cascades in ordered Cu₃Au are compared with the maximum dimensions of disordered zones imaged in transmission-electron-microscope superlattice reflections. Good agreement between the theoretical and experimental cascade dimensions is obtained only when the very small foil thicknesses necessary for the experimental technique are accounted for in the simulations. Because the cascades are much longer than the foil thicknesses for energies above 50 keV, the usefulness of this experimental technique may be limited to lower energies.