Concentration Dependence of Frenkel-Pair-Defect Annealing in Electron-Irradiated Ta and Nb
Open Access
- 15 December 1969
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 188 (3), 1093-1100
- https://doi.org/10.1103/physrev.188.1093
Abstract
The present work is an investigation into the dose dependence of the annealing spectra of Ta and Nb from 15 to 285°K after bombardment with 2.2-MeV electrons. Ta and Nb samples were irradiated to different defect concentrations, then simultaneously annealed isochronally from 14.7 up to 285°K. In Ta, recovery peaks were observed at 23, 51, 65, 123, and 170°K. The position of the peak near 170°K is dose-dependent and shows the characteristics of a second-order reaction. In Nb, recovery peaks were observed at 26.5, 58, 95, and 135°K. The peak at 95°K is dose-dependent and follows second-order kinetics initially, with an apparent shift to higher order toward the end of the stage. A two-interstitial model seems to give the best fit to the data.Keywords
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