Abstract
During 600 MeV proton irradiation, helium, hydrogen and other impurities are produced simultaneously with the displacement damage. Transmission election microscopy was used to characterize the bubble structure in aluminum after different irradiation temperatures (390 K-750 K) and doses (0.9 dpa-6.0 dpa). For low irradiation temperature, between 390 K and about 500 K, the observed homogeneous bubble structure was interpreted with a diatomic nucleation model. In the temperature regime between 500 K and 600 K, a bimodal bubble size distribution was observed in one specimen. For higher irradiation temperature, up to 750 K, two different behaviours appear: in the first case, specimens show the same behaviour as was observed at lower irradiation temperatures; in the other case, a lower bubble density (up to 50 times lower) of bigger bubbles was observed. This bifurcation at high irradiation temperatures is not yet well understood.
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© 1991 Springer Science+Business Media New York
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Paschoud, F., Victoria, M., Gotthardt, R. (1991). Helium Bubble Nucleation in Aluminium Irradiated with 600 MeV Protons. In: Donnelly, S.E., Evans, J.H. (eds) Fundamental Aspects of Inert Gases in Solids. NATO ASI Series, vol 279. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-3680-6_28
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DOI: https://doi.org/10.1007/978-1-4899-3680-6_28
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