Low-dose neutron irradiation damage in copper. I. Vacancy loop production
| Autor: | C. A. English, B. L. Eyre, J. W. Muncie |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
education.field_of_study
Materials science Physics and Astronomy (miscellaneous) Population Metals and Alloys chemistry.chemical_element Condensed Matter Physics Threshold energy Copper Electronic Optical and Magnetic Materials Recoil chemistry Vacancy defect General Materials Science Neutron Irradiation Atomic physics Dislocation education |
| Zdroj: | Philosophical Magazine A. 52:309-331 |
| ISSN: | 1460-6992 0141-8610 |
| DOI: | 10.1080/01418618508237629 |
| Popis: | In this paper vacancy loop production in neutron-irradiated pure copper is described. Single crystals with an [011] orientation have been irradiated at 355K and 523–623 K with doses of up to 2 × 1022nm−2 in the materials test reactor PLUTO. Subsequent observations in the transmission electron microscope of material irradiated at 355 K revealed that the damage structure consists of a uniform distribution of dislocation loops which are predominantly vacancy in nature. An analysis has been carried out to quantify the link between the cascades produced by energetic neutron lattice-atom collisions and the observed vacancy loop population. This has exposed the need to know the threshold energy, E T, required to generate a cascade that collapses to a loop of minimim visible size. Taking 6 keV and 10keV as limiting values for E T, the corresponding values of the recoil spectrum averaged defect yield, Y N, and cascade efficiency, eN, are 0·08 to 0·11 and 0·49 to 0·37, respectively. At irradiation temperat... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|