Resonant inelastic x-ray spectroscopy on UO2 as a test case for actinide materials

被引：9
作者：
Lander, G. H. [1 ,2 ]
Sundermann, M. [3 ,4 ]
Springell, R. [2 ]
Walters, A. C. [5 ]
Nag, A. [5 ]
Garcia-Fernandez, M. [5 ]
Zhou, K. J. [5 ]
van der Laan, G. [5 ]
Caciuffo, R. [1 ]
机构：
[1] European Commiss, Joint Res Ctr JRC, Postfach 2340, D-76125 Karlsruhe, Germany
[2] Univ Bristol, Interface Anal Ctr, Sch Phys, Tyndall Ave, Bristol BS8 1TL, Avon, England
[3] Univ Cologne, Inst Phys 2, Zulpicher Str 77, D-50937 Cologne, Germany
[4] Max Planck Inst Chem Phys Solids, Nothnizer Str 40, D-01187 Dresden, Germany
[5] Diamond Light Source, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2021年 / 33卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
RIXS; uranium dioxide; intermultiplet excitations; crystal field; INTERMULTIPLET TRANSITIONS; MAGNETIC EXCITATIONS; FIELD; SCATTERING; SPECTRA; STATES;
D O I：
10.1088/1361-648X/abc4d2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Resonant inelastic x-ray spectroscopy at the uranium N-4 absorption edge at 778 eV has been used to reveal the excitations in UO2 up to 1 eV. The earlier (1989) studies by neutron inelastic scattering of the crystal-field states within the H-3(4) multiplet are confirmed. In addition, the first excited state of the F-3(2) multiplet at similar to 520 meV has been established, and there is a weak signal corresponding to the next excited state at similar to 920 meV. This represents a successful application of soft x-ray spectroscopy to an actinide sample, and resolves an open question in UO2 that has been discussed for 50 years. The technique is described and important caveats are drawn about possible future applications.
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页数：5
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