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Electronic Structure and Surface Science of delta Plutonium

Published online by Cambridge University Press:  01 February 2011

M. Butterfield ,
T. Durakiewicz ,
E. Guziewicz ,
J. J. Joyce ,
D. P. Moore ,
A. J. Arko  and
L. A. Morales
M. Butterfield
Affiliation:
MST-10, LANL, Los Alamos, NM, USA.
T. Durakiewicz
Affiliation:
MST-10, LANL, Los Alamos, NM, USA.
E. Guziewicz
Affiliation:
MST-10, LANL, Los Alamos, NM, USA.
J. J. Joyce
Affiliation:
MST-10, LANL, Los Alamos, NM, USA.
D. P. Moore
Affiliation:
NMT-16, LANL, Los Alamos, NM, USA
A. J. Arko
Affiliation:
MST-10, LANL, Los Alamos, NM, USA.
L. A. Morales
Affiliation:
NMT-16, LANL, Los Alamos, NM, USA
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Abstract

High resolution photoelectron spectroscopy (PES) studies were conducted on a δ-phase Plutonium sample cleaned by laser ablation and gas dosed with O2 and H2. The measurements were made with an instrument resolution of 60 meV and with the sample at 77 K. The PES data strongly support a model with Pu2O3 growth on the metal and then PuO2 growth on the Pu2O3 layer at this temperature. In vacuum, the PuO2 reduces to Pu2O3 at room temperature with a pressure of 6×10−11 Torr. In the case of H2 dosing the hydrogen appears to penetrate the surface and disrupt the valence band as evidenced by a drop in intensity of the peak at EF which is not accompanied by a drop in the main 5f manifold at ∼2eV.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 802: Symposium DD – Actinides - Basic Science, Applications, and Technology , 2003 , DD2.8
Copyright
Copyright © Materials Research Society 2004

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References

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