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Abstract

Results of measurements of the radiation damage rate in fcc metals and especially in copper, which have been obtained in various laboratories during the last twenty years in the temperature range between 4 K and below ambient temperature with various amounts of impurities were fitted with simple rate equations. An almost complete fit with the experimental data is obtained if the effective migration activation energies of interstitials and of di-interstitials is assumed to decrease with increasing concentration of point defects and defect cluster i.e. with decreasing irradiation temperature. At the beginning of an irradiation at 4K the resulting defect pattern is described by dynamic crowdions propagation and crowdion reactions than by a pattern described by chemical rate equations. It can be seen from the analysis that interstitiation and vacancies migrate, annihilate and react at any irradiation temperature even though they do not migrate freely in this temperature range, it is further found that various amounts and types of impurities can increase the effective migration activation energies of the interstitials only very slightly and it is concluded that the binding energies between impurities and interstitial type defects are rather small.

Additional information

Authors: STEINBACH E, JRC ISPRA ESTAB. (ITALY);SCHUELE W JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: EUROPEAN APPLIED RESEARCH REPORTS + NUCLEAR SCIENCE AND TECHNOLOGY SECTION, VOL. 7 (1985), NO. 1, PP. 201-228, (EUR 9794 EN).
Availability: Can be ordered online
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