Title: Mass spectrometric studies of the vapor phase in the Pu-O system
Authors: GOTCU-FREIS P.COLLE Jean-YvesHIERNAUT Jean-PolNAISSE FredericGUENEAU ChristineKONINGS Rudy
Citation: JOURNAL OF CHEMICAL THERMODYNAMICS vol. 43 no. 8 p. 1164 - 1173
Publisher: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Publication Year: 2011
JRC N°: JRC63222
ISSN: 0021-9614
URI: http://www.elsevier.com/locate/jct
http://publications.jrc.ec.europa.eu/repository/handle/JRC63222
DOI: 10.1016/j.jct.2011.02.024
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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