J.G. Tobin, Univ. Wisconsin - Oshkosh

Present Position: Academic Staff Emeritus, UW-Oshkosh

ORCID ID: https://orcid.org/0000-0003-2294-3301

Physics: https://uwosh.edu/physics/faculty/

Chemistry: James Tobin, UWO Chemistry (uwosh.edu)

em.tif BW.tif MC.tif SCTE 1

Recent Awards

2025 AVS Fellow, James Tobin, University of Wisconsin-Oshkosh, “For crucial contributions to the present understanding of 5f electron states in actinides by means of advanced spectroscopic methods,” AVS - Current Awardees

Recent Peer Reviewed Publications

J.G. Tobin and M.F. Beaux, II, "Pu 5f Population: The Case for n = 5.0," Rep. Prog. Phys. 88 063101(2025); Pu 5f population: the case for n = 5.0 - IOPscience
J.G. Tobin, H. Ramanantoanina, C. Daul, P. Roussel, S.-W. Yu, D. Sokaras and A. Kutepov, "Isolating Multiplet Structure in 5f Inverse Photoemission, " Solid State Sciences 160, 107779 (2025), https://doi.org/10.1016/j.solidstatesciences.2024.107779
J. G. Tobin, "A Reassessment of 5f Occupation in Plutonium," J. Electron Spect. Rel. Phen.Volume 276, 147478 (2024), 10.1016/j.elspec.2024.147478, Free preprint at [2408.14517] A Reassessment of 5f Occupation in Plutonium (arxiv.org).
A. L. Kutepov, J. G. Tobin, S.-W. Yu, B. W. Chung and P. Roussel, "New insights into the electronic structure of α-U and δ-Pu," J. of Phys.: Cond. Matter, 36, 045601 (2024), https://doi.org/10.1088/1361-648X/ad00f6.
J. G. Tobin, "A quantitative evaluation of the 2nd derivative mode in electron energy loss spectroscopy," J. Electron Spectroscopy Rel. Phen. 268, 147387 (2023), https://doi.org/10.1016/j.elspec.2023.147387
J. G. Tobin and S.-W. Yu, "Pu5f Occupation in Plutonium Dioxide," Inorganic Chemistry 62, 6, 2592–2598 (2023), https://doi.org/10.1021/acs.inorgchem.2c03202
J. G. Tobin, S. Nowak, S.-W. Yu, R. Alonso-Mori, T. Kroll, D. Nordlund, T.-C. Weng, D. Sokaras, "5f Covalency from X-Ray Resonant Raman Spectroscopy," J. Phys. Cond. Matter 34, 505601 (2022), https://iopscience.iop.org/article/10.1088/1361-648X/ac9bbd.
J. G. Tobin, S. Nowak, S.-W. Yu, R. Alonso-Mori, T. Kroll, D. Nordlund, T.-C. Weng, D. Sokaras, "Direct Measurement of 5f Delocalization with U XES," MRS Bulletin 47, 1078–1083 (2022), Invited Impact Article, https://link.springer.com/article/10.1557/s43577-022-00419-x.
J. G. Tobin, H. Ramanantoanina, C. Daul, S.-W. Yu, P. Roussel, S. Nowak, R. Alonso-Mori, T. Kroll, D. Nordlund, T.-C. Weng, D. Sokaras, "The Unoccupied Electronic Structure of Actinide Dioxides," Phys. Rev. B 105, 125129 (2022), https://doi.org/10.1103/PhysRevB.105.125129

News Article

J.G. Tobin, "An Update on the Tender X-ray Spectroscopy of the Actinides," Synchrotron Radiation News, An Update on the Tender X-Ray Spectroscopy of the Actinides: Synchrotron Radiation News: Vol 0, No 0 - Get Access

International Committees

Actinides and Rare Earth Focus Topic, AVS 71st International Symposium and Exhibition, Charlotte, NC, USA, Sept 21 - 26, 2025, AVS71.

In Person Talks

J. G. Tobin, "Direct Measurement of 5f Delocalization with U XES," Spring 2022 Meeting of the Materials Research Society, Honolulu, Hawaii, USA, 8-13 May 2022.
J. G. Tobin, "Limitations in the Structural Determination of a Close-Packed Overlayer," AVS 68th International Symposium and Exhibition, Pittsburgh, PA, USA, 6-11 Nov 2022.
J. G. Tobin, "The Unoccupied Electronic Structure of Actinide Dioxides," Theory Frontiers in Actinide Science Workshop, Sante Fe, NM, USA, 26 February - 1 March, 2023.
J. G. Tobin, "The Fundamentals of X-Ray Emission," 14th School on the Physics and Chemistry of Actinides, Max Planck Institute, Dresden, Germany, April 17-19, 2023.
J. G. Tobin, "X-ray Resonant Raman Spectroscopy," 52nd Journees des Actinides Meeting, Max Planck Institute, Dresden, Germany, April 19-21, 2023.
J. G. Tobin, "X-ray Resonant Raman Spectroscopy," Dual Nature of 5f Electrons, Himeji, Japan, June 26-29, 2023.
J. G. Tobin, "Unoccupied Electronic Structure of Actinide Dioxides & Why n = 5 in PuO2," AVS International Symposium, Portland, OR, USA, Nov 5 - 10, 2023.
J. G. Tobin, "Extraction of the 5f Population from XAS, EELS & HERFD Branching Ratios," Spring 2024 Meeting of the Materials Research Society, Seattle, WA, USA, April 22-26, 2024.
J. G. Tobin, "Using HERFD to Isolate Multiplet Structure in 5f IPES/BIS," SCTE 2024, Prague, Czech Republic, 17-21 June 2024.
J. G. Tobin, "Resonant XES at the M4,5 and N4,5 Edges of the Oxides of U and Ce," ATAS/ActXAS Workshop, KIT, Karlsruhe, Germany, 7-11 October 2024
J. G. Tobin, "Isolating Multiplet Structure in 5f IPES/BIS," University of Muenster, Muenster, Germany, 14 October 2024.
J. G. Tobin, "A Reassessment of 5f Occupation in Pu," AVS International Symposium, Tampa, FL, USA, Nov 3-8, 2024.
J. G. Tobin, "The Revolution in Actinide Spectroscopy driven by X-Ray Emission," MRS Fall Symposium, Boston, MA, USA, Dec 1 - 6, 2024.
J. G. Tobin, "The Equivalence of HERFD and XAS & the Importance of the Crystal Field," Dual Nature of 5f Electrons Workshop, Idaho Falls, Idaho, USA, 19 -22 May 2025.
J. G. Tobin, "HERFD vs XAS: The Case for Equivalence," Prague Colloquium on f-Electron Systems (PCFES), Prague, Czech Republic, June 17-20, 2025.

SCTE 2 2024 AVS Dinner

Dual 2025 PCFES

Contact Info
JG Tobin
tobinj@uwosh.edu
Chemistry and Physics

J.G. Tobin, Univ. Wisconsin - Oshkosh

Recent Awards

2025 AVS Fellow, James Tobin, University of Wisconsin-Oshkosh, “For crucial contributions to the present understanding of 5f electron states in actinides by means of advanced spectroscopic methods,” AVS - Current Awardees

Recent Peer Reviewed Publications

J.G. Tobin and M.F. Beaux, II, "Pu 5f Population: The Case for n = 5.0," Rep. Prog. Phys. 88 063101(2025); Pu 5f population: the case for n = 5.0 - IOPscience

J.G. Tobin, H. Ramanantoanina, C. Daul, P. Roussel, S.-W. Yu, D. Sokaras and A. Kutepov, "Isolating Multiplet Structure in 5f Inverse Photoemission, " Solid State Sciences 160, 107779 (2025), https://doi.org/10.1016/j.solidstatesciences.2024.107779

J. G. Tobin, "A Reassessment of 5f Occupation in Plutonium," J. Electron Spect. Rel. Phen.Volume 276, 147478 (2024), 10.1016/j.elspec.2024.147478, Free preprint at [2408.14517] A Reassessment of 5f Occupation in Plutonium (arxiv.org).

A. L. Kutepov, J. G. Tobin, S.-W. Yu, B. W. Chung and P. Roussel, "New insights into the electronic structure of α-U and δ-Pu," J. of Phys.: Cond. Matter, 36, 045601 (2024), https://doi.org/10.1088/1361-648X/ad00f6.

J. G. Tobin, "A quantitative evaluation of the 2nd derivative mode in electron energy loss spectroscopy," J. Electron Spectroscopy Rel. Phen. 268, 147387 (2023), https://doi.org/10.1016/j.elspec.2023.147387

J. G. Tobin and S.-W. Yu, "Pu5f Occupation in Plutonium Dioxide," Inorganic Chemistry 62, 6, 2592–2598 (2023), https://doi.org/10.1021/acs.inorgchem.2c03202

J. G. Tobin, S. Nowak, S.-W. Yu, R. Alonso-Mori, T. Kroll, D. Nordlund, T.-C. Weng, D. Sokaras, "5f Covalency from X-Ray Resonant Raman Spectroscopy," J. Phys. Cond. Matter 34, 505601 (2022), https://iopscience.iop.org/article/10.1088/1361-648X/ac9bbd.

J. G. Tobin, S. Nowak, S.-W. Yu, R. Alonso-Mori, T. Kroll, D. Nordlund, T.-C. Weng, D. Sokaras, "Direct Measurement of 5f Delocalization with U XES," MRS Bulletin 47, 1078–1083 (2022), Invited Impact Article, https://link.springer.com/article/10.1557/s43577-022-00419-x.

J. G. Tobin, H. Ramanantoanina, C. Daul, S.-W. Yu, P. Roussel, S. Nowak, R. Alonso-Mori, T. Kroll, D. Nordlund, T.-C. Weng, D. Sokaras, "The Unoccupied Electronic Structure of Actinide Dioxides," Phys. Rev. B 105, 125129 (2022), https://doi.org/10.1103/PhysRevB.105.125129

News Article

J.G. Tobin, "An Update on the Tender X-ray Spectroscopy of the Actinides," Synchrotron Radiation News, An Update on the Tender X-Ray Spectroscopy of the Actinides: Synchrotron Radiation News: Vol 0, No 0 - Get Access

International Committees

Actinides and Rare Earth Focus Topic, AVS 71st International Symposium and Exhibition, Charlotte, NC, USA, Sept 21 - 26, 2025, AVS71.

In Person Talks

J. G. Tobin, "Direct Measurement of 5f Delocalization with U XES," Spring 2022 Meeting of the Materials Research Society, Honolulu, Hawaii, USA, 8-13 May 2022.

J. G. Tobin, "Limitations in the Structural Determination of a Close-Packed Overlayer," AVS 68th International Symposium and Exhibition, Pittsburgh, PA, USA, 6-11 Nov 2022.

J. G. Tobin, "The Unoccupied Electronic Structure of Actinide Dioxides," Theory Frontiers in Actinide Science Workshop, Sante Fe, NM, USA, 26 February - 1 March, 2023.

J. G. Tobin, "The Fundamentals of X-Ray Emission," 14th School on the Physics and Chemistry of Actinides, Max Planck Institute, Dresden, Germany, April 17-19, 2023.

J. G. Tobin, "X-ray Resonant Raman Spectroscopy," 52nd Journees des Actinides Meeting, Max Planck Institute, Dresden, Germany, April 19-21, 2023.

J. G. Tobin, "X-ray Resonant Raman Spectroscopy," Dual Nature of 5f Electrons, Himeji, Japan, June 26-29, 2023.

J. G. Tobin, "Unoccupied Electronic Structure of Actinide Dioxides & Why n = 5 in PuO2," AVS International Symposium, Portland, OR, USA, Nov 5 - 10, 2023.

J. G. Tobin, "Extraction of the 5f Population from XAS, EELS & HERFD Branching Ratios," Spring 2024 Meeting of the Materials Research Society, Seattle, WA, USA, April 22-26, 2024.

J. G. Tobin, "Using HERFD to Isolate Multiplet Structure in 5f IPES/BIS," SCTE 2024, Prague, Czech Republic, 17-21 June 2024.

J. G. Tobin, "Resonant XES at the M4,5 and N4,5 Edges of the Oxides of U and Ce," ATAS/ActXAS Workshop, KIT, Karlsruhe, Germany, 7-11 October 2024

J. G. Tobin, "Isolating Multiplet Structure in 5f IPES/BIS," University of Muenster, Muenster, Germany, 14 October 2024.

J. G. Tobin, "A Reassessment of 5f Occupation in Pu," AVS International Symposium, Tampa, FL, USA, Nov 3-8, 2024.

J. G. Tobin, "The Revolution in Actinide Spectroscopy driven by X-Ray Emission," MRS Fall Symposium, Boston, MA, USA, Dec 1 - 6, 2024.

J. G. Tobin, "The Equivalence of HERFD and XAS & the Importance of the Crystal Field," Dual Nature of 5f Electrons Workshop, Idaho Falls, Idaho, USA, 19 -22 May 2025.

J. G. Tobin, "HERFD vs XAS: The Case for Equivalence," Prague Colloquium on f-Electron Systems (PCFES), Prague, Czech Republic, June 17-20, 2025.