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Resonant inelastic x-ray spectroscopy on UO$_{2}$ as a test case for actinide materials

DOI: 10.1088/1361-648X/abc4d2 DOI Help

Authors: G. H. Lander (European Commission Joint Research Centre Karlsruhe) , Martin Sundermann (University of Cologne Institute of Physics II) , Ross Springell (University of Bristol) , Andrew Walters (Diamond Light Source) , Abhishek Nag (Diamond Light Source) , Mirian Garcia-Fernandez (Diamond Light Source) , Ke-Jin Zhou (Diamond Light Source) , Gerrit Van Der Laan (Diamond Light Source) , Roberto Caciuffo (European Commission Joint Research Centre Karlsruhe)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics: Condensed Matter

State: Published (Approved)
Published: October 2020
Diamond Proposal Number(s): 24583

Open Access Open Access

Abstract: Resonant inelastic x-ray spectroscopy at the uranium $N_{4}$ absorption edge at 778 eV has been used to reveal the excitations in UO$_{2}$ up to 1 eV. The earlier (1989) studies by neutron inelastic scattering of the crystal-field states within the $^{3}H_{4}$ multiplet are confirmed. In addition, the first excited state of the $^{3}F_{2}$ multiplet at $\sim$520 meV has been established, and there is a weak signal corresponding to the next excited state at $\sim$920 meV. This represents a successful application of soft x-ray spectroscopy to an actinide sample, and resolves an open question in UO$_{2}$ that has been discussed for 50 years. The technique is described and important caveats are drawn about possible future applications.

Subject Areas: Physics, Materials, Technique Development

Instruments: I21-Resonant Inelastic X-ray Scattering (RIXS)

Added On: 02/11/2020 15:27


Discipline Tags:

Radioactive Materials Hard condensed matter - electronic properties Physics Technique Development - Physics Materials Science

Technical Tags:

Scattering Resonant Inelastic X-ray Scattering (RIXS)