New insight in the uranium valence state determination in UyNd1−yO2±x

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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New insight in the uranium valence state determination in UyNd1−yO2±x. / Bes, Rene; Kvashnina, Kristina; Rossberg, Andreas; Dottavio, Gianinna ; Desgranges, Lionel; Pontillon, Yves; Solari, Pier Lorenzo; Butorin, Sergei; Martin, Philippe .

julkaisussa: Journal of Nuclear Materials, Vuosikerta 507, 15.08.2018, s. 145-150.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Harvard

Bes, R, Kvashnina, K, Rossberg, A, Dottavio, G, Desgranges, L, Pontillon, Y, Solari, PL, Butorin, S & Martin, P 2018, 'New insight in the uranium valence state determination in UyNd1−yO2±x', Journal of Nuclear Materials, Vuosikerta. 507, Sivut 145-150. https://doi.org/10.1016/j.jnucmat.2018.04.046

APA

Bes, R., Kvashnina, K., Rossberg, A., Dottavio, G., Desgranges, L., Pontillon, Y., ... Martin, P. (2018). New insight in the uranium valence state determination in UyNd1−yO2±x. Journal of Nuclear Materials, 507, 145-150. https://doi.org/10.1016/j.jnucmat.2018.04.046

Vancouver

Bes R, Kvashnina K, Rossberg A, Dottavio G, Desgranges L, Pontillon Y et al. New insight in the uranium valence state determination in UyNd1−yO2±x. Journal of Nuclear Materials. 2018 elo 15;507:145-150. https://doi.org/10.1016/j.jnucmat.2018.04.046

Author

Bes, Rene ; Kvashnina, Kristina ; Rossberg, Andreas ; Dottavio, Gianinna ; Desgranges, Lionel ; Pontillon, Yves ; Solari, Pier Lorenzo ; Butorin, Sergei ; Martin, Philippe . / New insight in the uranium valence state determination in UyNd1−yO2±x. Julkaisussa: Journal of Nuclear Materials. 2018 ; Vuosikerta 507. Sivut 145-150.

Bibtex - Lataa

@article{05ae68933f844dc780106a0d5cf61338,
title = "New insight in the uranium valence state determination in UyNd1−yO2±x",
abstract = "The charge compensation mechanisms in UyNd1−yO2±x and its consequence on the overall O stoichiometry (or O/M ratio where M = Nd + U) have been studied through the uranium valence state mixture evolution as a function of Nd content up to y = 0.62 by means of high energy resolution fluorescence detection X-ray absorption spectroscopy (HERFD-XAS) at the U M4-edge. Our results clearly demonstrate the formation of U5+ at low Nd content (y 0.15). Upon increasing the Nd content, oxygen vacancies and the formation of U6+ appear as competing mechanisms for intermediate Nd concentrations, leading to the co-existence of U4+/U5+/U6+ mixed valence and an overall hypostoichiometry (O/M 2.00). Finally, the formation of U6+ associated with strongly distorted U local environment is observed for high Nd concentrations (y = 0.62), leading to an overall hyperstoichiometry (O/M 2.00).",
author = "Rene Bes and Kristina Kvashnina and Andreas Rossberg and Gianinna Dottavio and Lionel Desgranges and Yves Pontillon and Solari, {Pier Lorenzo} and Sergei Butorin and Philippe Martin",
year = "2018",
month = "8",
day = "15",
doi = "10.1016/j.jnucmat.2018.04.046",
language = "English",
volume = "507",
pages = "145--150",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",

}

RIS - Lataa

TY - JOUR

T1 - New insight in the uranium valence state determination in UyNd1−yO2±x

AU - Bes, Rene

AU - Kvashnina, Kristina

AU - Rossberg, Andreas

AU - Dottavio, Gianinna

AU - Desgranges, Lionel

AU - Pontillon, Yves

AU - Solari, Pier Lorenzo

AU - Butorin, Sergei

AU - Martin, Philippe

PY - 2018/8/15

Y1 - 2018/8/15

N2 - The charge compensation mechanisms in UyNd1−yO2±x and its consequence on the overall O stoichiometry (or O/M ratio where M = Nd + U) have been studied through the uranium valence state mixture evolution as a function of Nd content up to y = 0.62 by means of high energy resolution fluorescence detection X-ray absorption spectroscopy (HERFD-XAS) at the U M4-edge. Our results clearly demonstrate the formation of U5+ at low Nd content (y 0.15). Upon increasing the Nd content, oxygen vacancies and the formation of U6+ appear as competing mechanisms for intermediate Nd concentrations, leading to the co-existence of U4+/U5+/U6+ mixed valence and an overall hypostoichiometry (O/M 2.00). Finally, the formation of U6+ associated with strongly distorted U local environment is observed for high Nd concentrations (y = 0.62), leading to an overall hyperstoichiometry (O/M 2.00).

AB - The charge compensation mechanisms in UyNd1−yO2±x and its consequence on the overall O stoichiometry (or O/M ratio where M = Nd + U) have been studied through the uranium valence state mixture evolution as a function of Nd content up to y = 0.62 by means of high energy resolution fluorescence detection X-ray absorption spectroscopy (HERFD-XAS) at the U M4-edge. Our results clearly demonstrate the formation of U5+ at low Nd content (y 0.15). Upon increasing the Nd content, oxygen vacancies and the formation of U6+ appear as competing mechanisms for intermediate Nd concentrations, leading to the co-existence of U4+/U5+/U6+ mixed valence and an overall hypostoichiometry (O/M 2.00). Finally, the formation of U6+ associated with strongly distorted U local environment is observed for high Nd concentrations (y = 0.62), leading to an overall hyperstoichiometry (O/M 2.00).

U2 - 10.1016/j.jnucmat.2018.04.046

DO - 10.1016/j.jnucmat.2018.04.046

M3 - Article

VL - 507

SP - 145

EP - 150

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -

ID: 20820263