JAMES TOBIN

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Lecturer & Emeritus

University of Wisconsin Oshkosh

United States

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James Tobin is a Lecturer & Emeritus at the University of Wisconsin Oshkosh, USA. His research focuses on electron scattering and X-ray spectroscopy, particularly in relation to actinide materials. Recent articles include topics such as multiplet structure in inverse photoemission and the electronic structure of uranium and plutonium compounds.

Recent Grants

Grant: Close

Complex Systems

Open Date: 1994-01-01

Close Date: 2012-01-01

Articles (20)

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2025

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2025

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2025

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2025

The Am N4,5 (4d3/2 and 4d5/2) and Am O4,5 (5d3/2 and 5d5/2) x-ray absorption spectroscopy (XAS) of americium sesquioxide (Am2O3) and americium dioxide (AmO2) has been evaluated with FEFF, a Green's function–based, multiple scattering code. Taking guidance from the intermediate coupling model (ICM), applicable to local and nonmagnetized samples, it is possible to completely reconstruct the experimental results for the N4,5 spectra, including the observed differences between the Am2O3 and the AmO2 cases. Although complicated by a more asymmetric line shape and difficult background variations, the FEFF analysis confirms the absence of core hole angular momentum coupling in Am O4,5 spectroscopy.

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2024

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2024

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2024

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2024

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2024

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2023

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2023

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2023

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2023

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2022

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2022

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2022

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2022

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2022

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2021

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2021

Collaborators (2)

S. M. Butorin

SWEDEN

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Paul Roussel

University of Oxford

UNITED KINGDOM

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JAMES TOBIN

Research Interests

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Recent Grants

Articles (20)

The importance of electron scattering in the analysis of actinide X-ray spectroscopy

Pu 5f population: the case for n = 5.0

An Update on the Tender X-Ray Spectroscopy of the Actinides

Isolating multiplet structure in 5f inverse photoemission

FEFF analysis of americium oxides

Application of FEFF to the x-ray spectroscopy of cerium dioxide

Quantifying the resonant photoemission of radiation damaged Pu

The insufficiency of the charge transfer model for resonant XES in UF4

New insights into the electronic structure of α-U and δ-Pu

Comment on “Investigations on ion irradiation induced modifications in Th 5f occupancy in thoria,” by P. Jegadeesan, S. Amirthapandian, Gurpreet Kaur, D. Sanjay Kumar, Arindam Das, D.K. Avasthi, K. Ananthasivan, B.K. Panigrahi

Adapting FEFF to 5f angular momentum coupling

Pu 5f Occupation in Plutonium Dioxide

Multielectronic and multiatomic effects in the U O4,5 x-ray absorption spectroscopy of uranium dioxide

5f covalency from x-ray resonant Raman spectroscopy

Direct measurement of 5f delocalization with U XES

An empirical analysis of α-U Bremsstrahlung Isochromat Spectroscopy

Thorium model and weak 5f delocalization

Unoccupied electronic structure of actinide dioxides

Comment on “Underlying simplicity of 5f unoccupied electronic structure” [J. Vac. Sci. Technol. A 39, 043205 (2021)]

Limitations in the structural determination of a close-packed overlayer

Collaborators (2)

S. M. Butorin

Paul Roussel

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