Abstract
Irradiation test data on reactor structural materials should include, in addition to fluence, the displacing dose expressed as displacements per atom (dpa) or damage energy per atom (depa). This provides a spectrum-dependent parameter that serves as a starting point for data correlations, as well as an exposure unit that is common to both neutron and charged-particle irradiations. To make this possible, displacement damage cross sections for neutrons have been calculated for aluminum, vanadium, chromium, iron, nickel, copper, zirconium, columbium, molybdenum, tantalum, tungsten, lead, and stainless steel using evaluated nuclear data files (ENDF/B-IV) data and the Lindhard energy partition model. These data extend to 20 MeV, hence cover the energy ranges of primary interest for both fission and fusion reactor applications. Tables are given in a standardized energy group structure. Figures are included to show the relative contributions of the various neutron scattering processes to both the primary knock-on atom spectra and the damage cross sections. A brief description of calculational procedures is given.
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