J. Phys. Soc. Jpn. 75S (2006) pp. 247-249  |Previous Article| |Next Article|  |Table of Contents|
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Proc. of 5th Int. Symposium on ASR-WYP-2005 – Advances in the Physics and Chemistry of Actinide Compounds –

Resonant X-Ray Scattering on the M-Edge Spectra from Triple-k Structure Phase in U_0.75Np_0.25O₂ and UO₂

Tatsuya Nagao and Jun-ichi Igarashi¹

We derive an expression for the scattering amplitude of resonant x-ray scattering under the assumption that the Hamiltonian describing the intermediate state preserves spherical symmetry. On the basis of this expression, we demonstrate that the energy profile of the RXS spectra expected near U and Np M₄ edges from the triple-k antiferromagnetic ordering phase in UO₂ and U_0.75Np_0.25O₂ agree well with those from the experiments. We demonstrate that the spectra in the σ–σ' and σ–π' channels exhibit quadrupole and dipole natures, respectively.

URL: http://jpsj.ipap.jp/link?JPSJS/75S/247/
DOI: 10.1143/JPSJS.75S.247

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