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|Title:||Mass spectrometric studies of the vapor phase in the Pu-O system|
|Authors:||GOTCU-FREIS P.; COLLE Jean-Yves; HIERNAUT Jean-Pol; NAISSE Frederic; GUENEAU Christine; KONINGS Rudy|
|Citation:||JOURNAL OF CHEMICAL THERMODYNAMICS vol. 43 no. 8 p. 1164 - 1173|
|Publisher:||ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD|
|Type:||Articles in periodicals and books|
|Abstract:||Vapor pressure measurements at high temperatures have been performed on plutonium oxide samples using a Knudsen cell coupled with a mass spectrometer. Different experimental conditions were applied for the derivation of the solid-gas phase relations for three compositions in the Pu-O phase diagram: the (Pu2O3-PuO2-x) two-phase domain, the congruent vaporization composition, and near stoichiometric PuO2. The partial pressures of gaseous species PuO2, PuO and Pu were assessed from ionization efficiency curves recorded at constant temperature. The vapor pressure results for different phase fields were discussed together with the available literature data. Keywords: high temperature mass spectrometry, Knudsen cell, plutonium oxide, solid-gas equilibria, vapor pressure.|
|JRC Directorate:||Nuclear Safety and Security|
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