[HTML][HTML] DFT+ U study of the structures and properties of the actinide dioxides

JT Pegg, X Aparicio-Angles, M Storr… - Journal of Nuclear …, 2017 - Elsevier
The actinide oxides play a vital role in the nuclear fuel cycle. For systems where current
experimental measurements are difficult, computational techniques provide a means of …

DFT + U Study of Uranium Dioxide and Plutonium Dioxide with Occupation Matrix Control

JL Chen, N Kaltsoyannis - The Journal of Physical Chemistry C, 2022 - ACS Publications
DFT+ U with occupation matrix control (OMC) is applied to study computationally bulk UO2
and PuO2, the latter for the first time. Using the PBESol functional in conjunction with OMC …

Evaluating f-Orbital Participation in the UV═E Multiple Bonds of [U(E)(NR2)3] (E = O, NSiMe3, NAd; R = SiMe3)

TH Nguyen, EL Paul, WW Lukens… - Inorganic Chemistry, 2023 - ACS Publications
The reaction of 1 equiv of 1-azidoadamantane with [UIII (NR2) 3](R= SiMe3) in Et2O results
in the formation of [UV (NR2) 3 (NAd)](1, Ad= 1-adamantyl) in good yields. The electronic …

Pu 5f occupation in plutonium dioxide

JG Tobin, SW Yu - Inorganic Chemistry, 2023 - ACS Publications
An actinide N4, 5 branching ratio analysis of PuO2 and UO2 has been performed, including
measurements with a scanning transmission electron microscope at the Advanced Light …

Unoccupied electronic structure of actinide dioxides

JG Tobin, H Ramanantoanina, C Daul, P Roussel… - Physical Review B, 2022 - APS
Ligand field density functional theory calculations of the dioxides of thorium, uranium, and
plutonium have been combined with high-energy-resolution fluorescence detection …

Hidden magnetic order in plutonium dioxide nuclear fuel

JT Pegg, AE Shields, MT Storr, AS Wills… - Physical Chemistry …, 2018 - pubs.rsc.org
A thorough understanding of the chemistry of PuO2 is critical to the design of next-
generation nuclear fuels and the long-term storage of nuclear materials. Despite over 75 …

Magnetic structure of UO 2 and NpO 2 by first-principle methods

JT Pegg, AE Shields, MT Storr, AS Wills… - Physical Chemistry …, 2019 - pubs.rsc.org
The magnetic structure of the actinide dioxides (AnO2) remains a field of intense research. A
low-temperature experimental investigation of the magnetic ground-state is complicated by …

Effect of pressure on mechanical and optical properties of ThO2 and PuO2

S Singh, Y Sonvane, KA Nekrasov… - Journal of the …, 2023 - Wiley Online Library
We have used DFT+ U with spin–orbit coupling to understand the effect of pressure on the
mechanical and optical properties of ThO2 and PuO2. Both the compounds are …

Electronic structure and core-level spectra of light actinide dioxides in the dynamical mean-field theory

J Kolorenč, AB Shick, AI Lichtenstein - Physical Review B, 2015 - APS
The local-density approximation combined with the dynamical mean-field theory (LDA+
DMFT) is applied to the paramagnetic phase of light actinide dioxides: UO 2, NpO 2, and …

The defect chemistry of non-stoichiometric PuO 2±x

WD Neilson, JT Pegg, H Steele… - Physical Chemistry …, 2021 - pubs.rsc.org
An increased knowledge of the chemistry of PuO2 is imperative for the design of procedures
to store, dispose, or make use of PuO2. In this work, point defect concentrations in PuO2 are …