Surface Spectroscopy Studies of the Oxidation Behavior of Uranium

J. Bloch; U. Atzmony; M. P. Dariel; M. H. Mintz; N. Shamir

doi:10.1016/0022-3115(82)90374-9

Surface Spectroscopy Studies of the Oxidation Behavior of Uranium

J. Bloch, U. Atzmony, M. P. Dariel, M. H. Mintz, N. Shamir

Unit of Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) techniques were utilized to study the oxidation behavior of clean uranium surfaces, at very low pressures of various atmospheres (UHV, H₂, O₂, and CO₂), at room temperature. Both for O₂ and CO₂, a precursor chemisorbed oxygen species has been identified at the very initial stage of the oxidation reaction. This chemisorbed oxygen transforms to the oxide form at a rate which depends on the pressure of the oxidizing atmosphere. Residual gaseous carbon compounds which are present even under UHV conditions result in the simultaneous formation of surface carbide which accompanies the initial stage of oxidation. This carbide however decomposes later as oxidation proceeds. Adventitious hydrocarbon adsorption occurs on the formed oxide layer.

Original language	English
Pages (from-to)	196-200
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	105
Issue number	2-3
DOIs	https://doi.org/10.1016/0022-3115(82)90374-9
State	Published - 1 Jan 1982

ASJC Scopus subject areas

Nuclear and High Energy Physics
Materials Science (all)
Nuclear Energy and Engineering

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title = "Surface Spectroscopy Studies of the Oxidation Behavior of Uranium",

abstract = "Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) techniques were utilized to study the oxidation behavior of clean uranium surfaces, at very low pressures of various atmospheres (UHV, H2, O2, and CO2), at room temperature. Both for O2 and CO2, a precursor chemisorbed oxygen species has been identified at the very initial stage of the oxidation reaction. This chemisorbed oxygen transforms to the oxide form at a rate which depends on the pressure of the oxidizing atmosphere. Residual gaseous carbon compounds which are present even under UHV conditions result in the simultaneous formation of surface carbide which accompanies the initial stage of oxidation. This carbide however decomposes later as oxidation proceeds. Adventitious hydrocarbon adsorption occurs on the formed oxide layer.",

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AU - Bloch, J.

AU - Atzmony, U.

AU - Dariel, M. P.

AU - Mintz, M. H.

AU - Shamir, N.

PY - 1982/1/1

Y1 - 1982/1/1

N2 - Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) techniques were utilized to study the oxidation behavior of clean uranium surfaces, at very low pressures of various atmospheres (UHV, H2, O2, and CO2), at room temperature. Both for O2 and CO2, a precursor chemisorbed oxygen species has been identified at the very initial stage of the oxidation reaction. This chemisorbed oxygen transforms to the oxide form at a rate which depends on the pressure of the oxidizing atmosphere. Residual gaseous carbon compounds which are present even under UHV conditions result in the simultaneous formation of surface carbide which accompanies the initial stage of oxidation. This carbide however decomposes later as oxidation proceeds. Adventitious hydrocarbon adsorption occurs on the formed oxide layer.

AB - Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) techniques were utilized to study the oxidation behavior of clean uranium surfaces, at very low pressures of various atmospheres (UHV, H2, O2, and CO2), at room temperature. Both for O2 and CO2, a precursor chemisorbed oxygen species has been identified at the very initial stage of the oxidation reaction. This chemisorbed oxygen transforms to the oxide form at a rate which depends on the pressure of the oxidizing atmosphere. Residual gaseous carbon compounds which are present even under UHV conditions result in the simultaneous formation of surface carbide which accompanies the initial stage of oxidation. This carbide however decomposes later as oxidation proceeds. Adventitious hydrocarbon adsorption occurs on the formed oxide layer.

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Surface Spectroscopy Studies of the Oxidation Behavior of Uranium

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