Search Results - "Miskowiec, Andrew"

Insight into the Structural Ambiguity of Actinide(IV) Oxalate Sheet Structures: A Case for Alternate Coordination Geometries by Sockwell, A. Kirstin, Sweet, Teagan F. M., Barth, Brodie, Isbill, Sara B., DiBlasi, Nicole A., Szymanowski, Jennifer E. S., Sigmon, Ginger E., Oliver, Allen G., Miskowiec, Andrew J., Burns, Peter C., Hixon, Amy E.

“…Plutonium(IV) oxalate hexahydrate (Pu(C2O4)2 ⋅ 6 H2O; PuOx) is an important intermediate in the recovery of plutonium from used nuclear fuel. Its formation by…”
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Structural, Spectroscopic, and Kinetic Insight into the Heating Rate Dependence of Studtite and Metastudtite Dehydration by Spano, Tyler L, Niedziela, Jennifer L, Shields, Ashley E, McFarlane, Joanna, Zirakparvar, Alex, Brubaker, Zachary, Kapsimalis, Roger J, Miskowiec, Andrew

“…Uranyl peroxide minerals studtite (UO2O2·4H2O) and metastudtite (UO2O2·2H2O) are important materials in the nuclear fuel cycle. When heated, they dehydrate and…”
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Elucidation of the Structure and Vibrational Spectroscopy of Synthetic Metaschoepite and Its Dehydration Product by Kirkegaard, Marie C, Niedziela, J. L, Miskowiec, Andrew, Shields, Ashley E, Anderson, Brian B

“…We confirm that synthetic uranyl hydroxide hydrate metaschoepite [(UO)­24O­(OH)6]·5H2O is unstable against dehydration under dry conditions, and we present a…”
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Evidence of a Nonphotochemical Mechanism for the Solid-State Formation of Uranyl Peroxide by Kirkegaard, Marie C, Miskowiec, Andrew, Ambrogio, Michael W, Anderson, Brian B

“…We have demonstrated the solid-state formation of a uranyl peroxide (UP) species from hydrated uranyl fluoride via a uranyl hydroxide intermediate, the first…”
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Front Cover: Insight into the Structural Ambiguity of Actinide(IV) Oxalate Sheet Structures: A Case for Alternate Coordination Geometries (Chem. Eur. J. 47/2023) by Sockwell, A. Kirstin, Sweet, Teagan F. M., Barth, Brodie, Isbill, Sara B., DiBlasi, Nicole A., Szymanowski, Jennifer E. S., Sigmon, Ginger E., Oliver, Allen G., Miskowiec, Andrew J., Burns, Peter C., Hixon, Amy E.

“…Old, limited data in the nuclear field is relied upon, but often requires revisiting for clarity. Like cracked glasses, flaws in old data can lead to missing…”
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Insight into the Structural Ambiguity of Actinide(IV) Oxalate Sheet Structures: A Case for Alternate Coordination Geometries by Sockwell, A. Kirstin, Sweet, Teagan F. M., Barth, Brodie, Isbill, Sara B., DiBlasi, Nicole A., Szymanowski, Jennifer E. S., Sigmon, Ginger E., Oliver, Allen G., Miskowiec, Andrew J., Burns, Peter C., Hixon, Amy E.

“…Invited for the cover of this issue is the group of Amy Hixon at the University of Notre Dame. The image depicts the newly identified structure of a PuIV…”
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Probing Li ion dynamics in amorphous xLi2SO4⋅(1 − x)LiPO3 by quasielastic neutron scattering by Heitmann, Tom, Hester, Gavin, Mitra, Saibal, Calloway, Thomas, Tyagi, Madhu Sudan, Miskowiec, Andrew, Diallo, Souleymane, Osti, Naresh, Mamontov, Eugene

“…The diffusion dynamics of a series of lithium sulfate substituted phosphate glass materials xLi2SO4 ⋅(1 − x)LiPO3 has been probed by quasielastic neutron…”
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Analysis of Water Coupling in Inelastic Neutron Spectra of Uranyl Fluoride by Miskowiec, Andrew, Niedziela, J. L., Kirkegaard, Marie C., Shields, Ashley E.

“…Inelastic neutron scattering (INS) is uniquely sensitive to hydrogen due to its comparatively large thermal neutron scattering cross-section (82 b)…”
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The Impact of Coordination Environment on the Thermodynamic Stability of Uranium Oxides by Shields, Ashley E, Miskowiec, Andrew J, Maheshwari, Ketan, Kirkegaard, Marie C, Staros, Daniel J, Niedziela, Jennifer L, Kapsimalis, Roger J, Anderson, Brian B

“…Amorphous uranium oxides are known to arise via industrial processes relevant to the nuclear fuel cycle yet evade rigorous structural characterization. A…”
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A preliminary investigation into the use of molecular oxide and hydride secondary ion relationships for improvement of the 236U/238U determination on a NanoSIMS 50L by Zirakparvar, N. Alex, Hexel, Cole R., Smith, Julie B., Miskowiec, Andrew J., Spano, Tyler L., Kapsimalis, Roger

“…A NanoSIMS 50L is used to investigate uranium molecular ( 235 U 16 O, 236 U 16 O, 238 U 16 O, 235 U 1 H, 238 U 1 H, 236 U 16 O 1 H, and 238 U 16 O 1 H) and…”
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Vibrational properties of uranium fluorides by Miskowiec, Andrew, Shields, Ashley E., Niedziela, J.L., Cheng, Yongqiang, Taylor, Paul, DelCul, Guillermo, Hunt, Rodney, Spencer, Barry, Langford, John, Abernathy, Douglas

“…Multiphase mixtures of the uranium fluoride compounds UFx with x = 3, 4, 4.5, 5, whose local U–F bonding geometry is conserved, may result from UF6 reduction…”
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Structural Phase Transitions and Water Dynamics in Uranyl Fluoride Hydrates by Miskowiec, Andrew, Kirkegaard, Marie C, Huq, Ashfia, Mamontov, Eugene, Herwig, Kenneth W, Trowbridge, Lee, Rondinone, Adam, Anderson, Brian

“…We report a novel production method for uranium oxyfluoride [(UO2)7F14(H2O)7]·4H2O, referred to as structure D. Structure D is produced as a product of…”
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A NanoSIMS 50 L Investigation into Improving the Precision and Accuracy of the 235U/238U Ratio Determination by Using the Molecular 235U16O and 238U16O Secondary Ions by N. Alex Zirakparvar, Cole R. Hexel, Andrew J. Miskowiec, Julie B. Smith, Michael W. Ambrogio, Douglas C. Duckworth, Roger Kapsimalis, Brian W. Ticknor

“…A NanoSIMS 50 L was used to study the relationship between the 235U/238U atomic and 235U16O/238U16O molecular uranium isotope ratios determined from a variety…”
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Non-destructive characterization of advanced nuclear fuel materials using neutron imaging by Zhang, Yuxuan, Myhre, Kristian G., Bilheux, Hassina Z., Johnson, Jared A., Bilheux, Jean C., Parish, Chad M., Miskowiec, Andrew J., Hunt, Rodney D., Lin, Jiao Y.Y.

“…Attenuation-based neutron computed tomography (CT) has been used to non-destructively characterize the uncoated tristructural-isotropic (TRISO) nuclear fuel…”
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Strain-Induced Shifts in Defective Graphite Phonon Modes Predicted by Density Functional Theory by Isbill, Sara B., Shields, Ashley E., Brubaker, Zach E., Miskowiec, Andrew J., Niedziela, J. L.

“…Carbon fiber composites have gained attention as a structural material because of their high strength-to-weight ratio, and understanding the effect of defects…”
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Optical vibrational spectra of β -U 3 O 8 by Miskowiec, Andrew, Spano, T., Hunt, R., Kurley, J.M.

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Insights into the thermal history of carbon fibers using Raman spectroscopy and a novel kinetic model by Brubaker, Zach E., Miskowiec, Andrew, Niedziela, Jennifer L.

“…Carbon fibers and carbon fiber composites are applied in high-performance applications, but a key consideration for application is their relative sensitivity…”
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Product-specific kinetics reveal effect of epoxy crystallization on thermoset thermal degradation by Dwyer, Derek B., Gallego, Nidia C., Isbill, Sara, Miskowiec, Andrew, Niedziela, J.L.

“…Crystallization is a common problem for epoxy resins, which are ubiquitous in industrial and commercial use. Integration of crystallized epoxy monomers into…”
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Optical vibrational spectroscopic signatures related to U3O8 production processes by Roach, Jordan M., Miskowiec, Andrew, McDonald, Luther, Abbott, Erik C., Nizinski, Cody A., Schwerdt, Ian J., Spano, Tyler L.

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Structural features of early fuel cycle taggant incorporation for intentional nuclear forensics by Spano, Tyler L., Beiswenger, Toya N., Manard, Benjamin T., Ulrich, Tash L., Hunt, Rodney, Miskowiec, Andrew, Shields, Ashley E.

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