Photothermal Deflection Spectroscopy Investigations of Uranium Electrochemistry

by Richard E. Russo, Lawrence Berkeley Lab, Berkeley, United States,
James D. Rudnicki, Lawrence Berkeley Lab, Berkeley, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract:

Photothermal deflection spectroscopy (PDS) has been successfully applied to the study of uranium oxide electrochemistry. A brief description of PDS and preliminary results that demonstrate the technique are presented. Concentration gradients formed at the electrode surface are measured by this technique. The gradients give insight into the reaction mechanisms. There is some evidence of the initiation of non-electrochemical dissolution of the uranium oxide. Optical absorption by the uranium oxide is measured by PDS and the first results indicate that the absorption of the surface does not change during electrochemical experiments. This result is contrary to literature measurements of bulk samples that indicate that the optical absorption should be strongly changing.

Subject Headings: Uranium | Absorption | Displacement (mechanics) | Thermal effects | Radioactive materials | Light (natural) | Hazardous substances

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