Abstract

The calculation of displacement rates in neutron and electron irradiations is reviewed. Comparisons are made of neutron displacement cross sections calculated using several secondary displacement models. Included are comparisons of some spectrum-averaged cross sections for EBR-II and FFTF spectra. The status of electron displacement cross sections is reviewed. An exercise is performed to deduce neutron and electron displacement cross sections consistent with an assumed direction dependent damage energy threshold. It is suggested that neutron-electron damage correlations should be based on free defect cross sections rather than displacement cross sections.

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