Covalency in oxidized uranium

J. G. Tobin, S.-W. Yu, R. Qiao, W. L. Yang, C. H. Booth, D. K. Shuh, A. M. Duffin, D. Sokaras, D. Nordlund, and T.-C. Weng
Phys. Rev. B 92, 045130 – Published 29 July 2015

Abstract

Using x-ray emission spectroscopy and absorption spectroscopy, it has been possible to directly access the states in the unoccupied conduction bands that are involved with 5f and 6d covalency in oxidized uranium. By varying the oxidizing agent, the degree of 5f covalency can be manipulated and monitored, clearly and irrevocably establishing the importance of 5f covalency in the electronic structure of the key nuclear fuel, uranium dioxide.

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  • Received 15 April 2015

DOI:https://doi.org/10.1103/PhysRevB.92.045130

©2015 American Physical Society

Authors & Affiliations

J. G. Tobin* and S.-W. Yu

  • Lawrence Livermore National Laboratory, Livermore, California 94550, USA

R. Qiao, W. L. Yang, C. H. Booth, and D. K. Shuh

  • Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

A. M. Duffin

  • Pacific Northwest National Laboratory, Richland, Washington 99354, USA

D. Sokaras, D. Nordlund, and T.-C. Weng

  • Stanford Synchrotron Radiation Lightsource, Stanford, Menlo Park, California 94025, USA

  • *Corresponding author: Tobin1@LLNL.Gov

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Issue

Vol. 92, Iss. 4 — 15 July 2015

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