In order to test the validity of void-swelling predictions experimentally, as-received and annealed specimens were irradiated with 2.5MeV electrons, 3MeV protons and fission neutrons at about 520K. All of the experiments were carried out using a damage rate of about 10-8dpa/s. The post-irradiation defect microstructures were investigated by using resistivity, transmission electron microscopic and positron annihilation spectroscopic techniques. The accumulation of defects in the form of planar clusters and voids was found to increase appreciably with increasing recoil energy; in good agreement with the predictions of the production bias model.

On Recoil Energy Dependent Void Swelling in Pure Copper - Experimental Results. B.N.Singh, M.Eldrup, A.Horsewell, P.Ehrhart, F.Dworschak: Philosophical Magazine A, 2000, 80[11], 2629-50