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Abstract
Diffuse elastic scattering of electrons by single nanometre-sized defects in ion-irradiated Au has been measured quantitatively. Diffuse scattering from isolated single dislocation loops is separated from Bragg scattering at a weakly excited diffraction peak. Results are compared among several dislocation loop geometries and published calculations for diffuse scattering of x-rays. The pattern in the diffuse scattering within a single reciprocal lattice plane reveals the loop geometry and interstitial or vacancy nature.
Acknowledgements
The authors would like to thank A. McCormick and L. Funk for assistance with the in situ ion irradiations in the IVEM-Tandem Accelerator Facility in the Electron Microscopy Center at Argonne National Laboratory. The authors thank B. Kestel for sample preparations. This research was supported by the U.S. Department of Energy, Office of Science, under contracts W-31-109-ENG-38 (ANL) and DEFG02-91-ER45439 (UIUC).