If non‐superposed, distant, displacement cascades are produced in a metal, the total resistivity change is equal to the sum of the resistivity changes due to each individual cascade. In this paper a study is made of the resistivity change of a single cascade, specifically taking into account the correlation between interstitials and vacancies in the cascades, by means of the distribution functions of the interstitials and vacancies. The ratio between the resistivity change due to the cascade, and the “ideal” resistivity change (corresponding to the production in the metal of an equal number of independent interstitial‐vacancy pairs) decreases with an increase in the number of cascade pairs. This result may explain why the resistivity variation obtained experimentally by irradiation is smaller than the resistivity variation obtained theoretically by summing the contributions from individual defects.
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Corciovei et al. (1964) studied this question.
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