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Title: Additional complexity in the Raman spectra of U 3O 8

Abstract

Uranium oxides are readily amenable to investigation using Raman spectroscopy, and this approach is frequently used as a chemical analysis tool. We show, in triuranium octoxide (U 3O 8), the presence of previously unreported Raman peaks located below 100 cm ₋1. By maximum intensity, the strongest peak in U 3O 8 appears at 54 cm ₋1 and is resolution limited, making this mode an ideal candidate for chemically identifying U3O8 using Raman spectroscopy. Detailed peak analysis suggests that the main spectral feature between 300 and 500 cm ₋1 is more accurately described by a septet than a triplet. Two samples of differing oxygen content show only minor differences in bulk crystal structure, but subtle changes in lattice dynamics are suggestive of defect scattering in analogy to UO 2+x.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1564193
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 527; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Raman spectroscopy; Uranium oxides; U3O8

Citation Formats

Miskowiec, Andrew, Niedziela, Jennifer L., Spano, Tyler L., Ambrogio, Michael W., Finkeldei, Sarah, Hunt, Rodney Dale, and Shields, Ashley E. Additional complexity in the Raman spectra of U3O8. United States: N. p., 2019. Web. doi:10.1016/j.jnucmat.2019.151790.
Miskowiec, Andrew, Niedziela, Jennifer L., Spano, Tyler L., Ambrogio, Michael W., Finkeldei, Sarah, Hunt, Rodney Dale, & Shields, Ashley E. Additional complexity in the Raman spectra of U3O8. United States. doi:10.1016/j.jnucmat.2019.151790.
Miskowiec, Andrew, Niedziela, Jennifer L., Spano, Tyler L., Ambrogio, Michael W., Finkeldei, Sarah, Hunt, Rodney Dale, and Shields, Ashley E. Tue . "Additional complexity in the Raman spectra of U3O8". United States. doi:10.1016/j.jnucmat.2019.151790.
@article{osti_1564193,
title = {Additional complexity in the Raman spectra of U3O8},
author = {Miskowiec, Andrew and Niedziela, Jennifer L. and Spano, Tyler L. and Ambrogio, Michael W. and Finkeldei, Sarah and Hunt, Rodney Dale and Shields, Ashley E.},
abstractNote = {Uranium oxides are readily amenable to investigation using Raman spectroscopy, and this approach is frequently used as a chemical analysis tool. We show, in triuranium octoxide (U3O8), the presence of previously unreported Raman peaks located below 100 cm₋1. By maximum intensity, the strongest peak in U3O8 appears at 54 cm₋1 and is resolution limited, making this mode an ideal candidate for chemically identifying U3O8 using Raman spectroscopy. Detailed peak analysis suggests that the main spectral feature between 300 and 500 cm₋1 is more accurately described by a septet than a triplet. Two samples of differing oxygen content show only minor differences in bulk crystal structure, but subtle changes in lattice dynamics are suggestive of defect scattering in analogy to UO2+x.},
doi = {10.1016/j.jnucmat.2019.151790},
journal = {Journal of Nuclear Materials},
number = C,
volume = 527,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
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This content will become publicly available on September 10, 2020
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