Resonant inelastic x-ray spectroscopy on UO2 as a test case for actinide materials
Resonant inelastic x-ray spectroscopy on UO2 as a test case for actinide materials
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UO2 共振非弹性 X 射线光谱作为锕系材料的测试案例
DOI：
10.1088/1361-648x/abc4d2
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
G. Lander;M. Sundermann;R. Springell;Andrew Walters;A. Nag;M. García-Fernández;K. Zhou;G. van der Laan
中科院分区：
文献类型：
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作者：
G. Lander;M. Sundermann;R. Springell;Andrew Walters;A. Nag;M. García-Fernández;K. Zhou;G. van der Laan
铀 N4 吸收边 778 eV 处的共振非弹性 X 射线光谱已被用来揭示 UO2 高达 1 eV 的激发。早期（1989）通过中子非弹性散射对 3H4 多重态晶体场态进行的研究得到了证实。此外，3F2多重态在~520 meV处的第一激发态已经建立，并且在~920 meV处存在对应于下一个激发态的微弱信号。这代表了软 X 射线光谱法在锕系元素样品中的成功应用，并解决了 UO2 中已讨论了 50 年的悬而未决的问题。描述了该技术，并对未来可能的应用提出了重要的注意事项。
Resonant inelastic x-ray spectroscopy at the uranium N4 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 3H4 multiplet are confirmed. In addition, the first excited state of the 3F2 multiplet at ∼520 meV has been established, and there is a weak signal corresponding to the next excited state at ∼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.