| Autor: |
V. A. Somenkov, V. K. Orlov, V. P. Glazkov, M. S. Blanter, A. V. Laushkin |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Journal of Nuclear Materials. 452:465-468 |
| ISSN: |
0022-3115 |
| DOI: |
10.1016/j.jnucmat.2014.05.036 |
| Popis: |
In this paper, we report on a continuing neutron diffraction study of the mean-square atom displacements occurring during the long-term self-irradiation of a Pu–Ga alloy. The measurements were performed at room temperature using the sample based on the isotope Pu 242 with low neutron absorption cross-section to which the short-lived isotope Pu 238 (1.4 wt.%) was added to accelerate self-irradiation. We obtain the maximum self-irradiation equivalent time of 35.5 years, 12 years longer than in our previous papers. In the entire range of self-irradiation time a single fcc phase is preserved. It was found that after the two stages of change in the mean-square displacements we observed earlier (rapid growth up to ∼5–6 equivalent years and a slow decline in the range of ∼6–25 years), comes a stage of stabilization (after ∼25 years). The stabilization can be explained by the emergence of a balance between the formation of point defects and their absorption by helium bubbles and dislocation loops which accumulated over time. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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