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Towards the Quantification of 5f Delocalization

Journal Article · · Applied Sciences
DOI:https://doi.org/10.3390/app10082918· OSTI ID:2377886

By using M4,5 X-ray Emission Spectroscopy (XES) in the tender X-ray regime, it is possible to quantify 5f delocalization in the actinides. Previous analyses, utilizing the Branching Ratio (BR) in the N4,5 X-ray Absorption Spectroscopy (XAS), could not discriminate between the cases of localized n = 2 and delocalized n = 3, in uranium materials, where n is the number of 5f electrons on the U entity. Here, it is shown that, by employing the ubiquitous 6p → 3d XES as a point of normalization, the localized n = 2 and delocalized n = 3 cases can be easily distinguished and quantified.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); SLAC National Accelerator Laboratory, Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515; AC52-07NA27344
OSTI ID:
2377886
Alternate ID(s):
OSTI ID: 1616165
OSTI ID: 1682521
Report Number(s):
LLNL-JRNL--811150; PII: app10082918
Journal Information:
Applied Sciences, Journal Name: Applied Sciences Journal Issue: 8 Vol. 10; ISSN ASPCC7; ISSN 2076-3417
Publisher:
MDPI AGCopyright Statement
Country of Publication:
Switzerland
Language:
English

References (39)

Probing actinide electronic structure through pu cluster calculations journal February 2013
Metallic radii and electron configurations of the 5f−6d metals journal October 1973
Electronic structure and Coulomb correlation energy in UO2 single crystal journal February 1980
Inverse photoemission study of uranium dioxide journal September 1982
Bonding in uranium oxides: The role of 5f electrons journal October 1974
Multi-electronic effects in uranium dioxide from X-ray Emission Spectroscopy journal April 2013
The effects of mesoscale confinement in Pu clusters and isolated particles journal June 2014
The apparent absence of chemical sensitivity in the 4d and 5d X-ray absorption spectroscopy of uranium compounds journal June 2014
Delocalization and occupancy effects of 5f orbitals in plutonium intermetallics using L3-edge resonant X-ray emission spectroscopy journal June 2014
Electron spectroscopy of the oxidation and aging of U and Pu journal November 2015
Separate measurement of the 5f5/2 and 5f7/2 unoccupied density of states of UO2 journal April 2019
Beyond spin-orbit: Probing electron correlation in the Pu 5f states using spin-resolved photoelectron spectroscopy journal October 2007
The role of the 5f valence orbitals of early actinides in chemical bonding journal July 2017
A versatile Johansson-type tender x-ray emission spectrometer journal March 2020
Multiconfigurational nature of 5f orbitals in uranium and plutonium intermetallics journal June 2012
Band structures of 4 f and 5 f materials studied by angle-resolved photoelectron spectroscopy journal March 2016
Observation of 5f intermediate coupling in uranium x-ray emission spectroscopy journal January 2020
X-ray photoelectron studies of thorium, uranium, and their dioxides journal December 1974
X-ray photoemission spectroscopy study of hexavalent uranium compounds journal December 1975
X-ray photoelectron-spectroscopy study of oxides of the transuranium elements Np, Pu, Am, Cm, Bk, and Cf journal March 1977
High-energy spectroscopic study of the occupied and unoccupied 5 f and valence states in Th and U metals journal March 1980
Near-edge x-ray-absorption fine structure in uranium compounds journal February 1987
X-ray-absorption sum rules in jj -coupled operators and ground-state moments of actinide ions journal June 1996
Approximative treatment of 5 f -systems with partial localization due to intra-atomic correlations journal April 2004
Competition between delocalization and spin-orbit splitting in the actinide 5 f states journal August 2005
Spectral functions for strongly correlated 5 f electrons journal January 2006
Angle-resolved photoemission and first-principles electronic structure of single-crystalline α -U(001) journal January 2007
Observation of strong resonant behavior in the inverse photoelectron spectroscopy of Ce oxide journal February 2011
Oxidation and crystal field effects in uranium journal July 2015
Covalency in oxidized uranium journal July 2015
Probing 5 f -state configurations in URu 2 Si 2 with U L III -edge resonant x-ray emission spectroscopy journal July 2016
Manifestation of electron correlation effect in 5 f states of uranium compounds revealed by 4 d – 5 f resonant photoelectron spectroscopy journal January 2019
Orbital Specificity in the Unoccupied States of UO 2 from Resonant Inverse Photoelectron Spectroscopy journal October 2011
Chemical State of Complex Uranium Oxides journal December 2013
Calculated Bulk Properties of the Actinide Metals journal July 1978
Failure of Russell-Saunders Coupling in the 5 f States of Plutonium journal May 2003
Applicability of the Spin-Orbit Sum Rule for the Actinide 5 f States journal August 2004
5f states with spin-orbit and crystal field splittings journal May 2019
Electronic Structure of Heavy Fermion Uranium Compounds Studied by Core-Level Photoelectron Spectroscopy journal January 2012

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