Abstract Several internal friction peaks are observed on cold-worked f.c.c. : etals: the Bordoni peaks, interpreted by a dislocation-lattice interaction, and the Hasiguti peaks, P 1, P 2, P 3, by a dislocation-point defect interaction. Measurements conducted on specimens previously plastically deformed and annealed in order to obtain a suitable network of dislocations, then irradiated with neutrons or electrons at low temperature, prove that Hasiguti peaks P 1, P 2, and P 3 of gold are caused by an interaction between dislocations and intrinsic mobile point defects. A theoretical model calculated from diffusion of point defects distributed at random on dislocations is also presented; with such a model for Hasiguti peaks our results can be interpreted as follows. During stage II of resistivity recovery clusters of self-interstititals grow on dislocations. At about 190 K, they become mobile and cause P 2. During stage III, vacancies diffuse to dislocations and annihilate together with self-interstitials or ...