Average atomic-displacement energies of cubic metals

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Abstract
A method is described to derive average atomic-displacement energies from damage-rate measurements on polycrystalline materials under electron irradiation. The results for several cubic metals are compared to data obtained from electron irradiations of single crystals and to effective displacement energies derived from fast-neutron and heavy-ion irradiations. Differences are discussed in terms of focusing of replacement sequences and of reduced damage efficiency of large cascades, respectively.