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Several adsorption studies have been carried out previously to correlate 5f electron properties and the surface properties of actinide intermetallics. Due to the high affinity of the actinides to oxygen, it was not possible to study uranium-nickel alloy in an unoxidised form. Investigations were therefore carried out on ternary compounds of actinides, with the third element (Th or Al) acting as a buffer for the oxygen. The work presented here concerns adsorption studies performed on UNiAl with the gases O(2), CO(2) and CO at two temperatures (73 K and 296 K). The surface sensitive photoemission techniques XPS and UPS were used. Several different steps of physi- and chemisorption were observed, as in UNi(2), but with some energy shifts. The sticking coefficient of the gases at the surface varied with time and temperature.

Additional information

Authors: ALMEIDA T, JRC Karlsruhe (DE);SPIRLET J C, JRC Karlsruhe (DE);NAEGELE J, JRC Karlsruhe (DE);HAVELA L, Charles University, Department of Metal Physics, Prague (CS)
Bibliographic Reference: Paper presented: 21èmes Journées des Actinides, Montechoro (PT), April 28 - May 1, 1991
Availability: Text not available
Record Number: 199111339 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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