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Mass spectrometric measurements of effusing vapours over PuO2 and (U, Pu)O2 indicate the presence of volatile PuO3 molecules. The formation of plutonium trioxide vapour is due to a chemical process involving oxygen absorbed during previous oxidation of the sample. Though in the examined samples the fraction of trioxide effusing in vacuum was of the order of 0.02 ppm, under steady state oxidation conditions it has been shown that the process can have a relevant effect on the sublimation of the dioxide.

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Authors: RONCHI C, ITU-Karlsruhe, Karlsruhe (DE);CAPONE F, ITU-Karlsruhe, Karlsruhe (DE);COLLE J F, ITU-Karlsruhe, Karlsruhe (DE);HIERNAUT JP, ITU-Karlsruhe, Karlsruhe (DE)
Bibliographic Reference: Article: Journal of nuclear materials (1999)
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