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A high-resolution neutron scattering investigation of the crystal field splittings of UO2
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1987
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High ResolutionEngineeringPhysicsCrystal Field ExcitationsHigh-resolution NeutronNatural SciencesCondensed Matter PhysicsApplied PhysicsMagnetic ResonanceNeutron SourceCrystal Field SplittingsChemistryU4+ IonNeutron ScatteringCrystallography
Measurements of the crystal field excitations of UO2 have been made using the high-energy transfer spectrometer of the U.K. spallation neutron source, ISIS. Scans with high resolution have revealed splittings due to exchange interactions and lattice distortions in the antiferromagnetic phase. A new crystal field potential for the U4+ ion is deduced, with important implications for the thermodynamic properties of the compound.