Abstract
The effects of some recent developments on displacement cross sections published by the author for iron, chromium, nickel, 18/10 stainless steel, and tantaium are discussed. It is argued that, except for tantalum, the cross sections are essentially consistent with ENDF/B-III, and furthermore, can be made consistent with an IAEA-recommended secondary displacement model by multiplying by 0.66. A redetermination of the tantalum displacement cross section was made using ENDF/B-III data and an effective displacement energy of 90 eV deduced from a recent measurement of the displacement threshold surface for tantalum. Estimates are made of ihe contributions to displacement cross sections of several previously ignored nonelastic processes. Finally, the usefulness of the isotropic elastic-scattering approximation at high neutron energies is discussed. (auth)
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