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Title: Hyper-Raman spectroscopy of CeO2

Abstract

Cerium dioxide (CeO2) belongs to the fluorite structure group (Oh 5 point group) resulting in one Raman active T2g mode and two IR active T1u TO and LO modes. The T2g Raman band in CeO2 has been used to probe the symmetric Ce-O vibrational mode of different sized nanoparticulates. Far infrared studies of the Ce-O interactions are difficult to conduct due to low optical transmission, efficiency of the detector and water absorption bands interfering with the measurements. The selection rules of hyper-Raman spectroscopy (HRS) allow the study of IR bands in the far infrared spectral region, such as the motion of the Ce atoms. For the first time, HRS was used to investigate the T1u TO and LO IR modes in CeO2. The position and full-width half-maximum (FWHM) of the TO and LO bands in the HRS spectrum were used to investigate the spectral response in relation to particle size (i.e., phonon confinement). The investigation of CeO2 with HRS provides a research platform for future work in the study of ThO2, UO2 and PuO2 IR modes.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1]
  1. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
OSTI Identifier:
1632835
Alternate Identifier(s):
OSTI ID: 1616191
Report Number(s):
SRNL-STI-2020-00011
Journal ID: ISSN 0377-0486
Grant/Contract Number:  
AC09-08SR22470; SR19‐Spec‐Signatures NDD3Bb; LDRD‐2013‐00029
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Raman Spectroscopy
Additional Journal Information:
Journal Volume: 51; Journal Issue: 7; Journal ID: ISSN 0377-0486
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Villa‐Aleman, Eliel, Houk, Amanda L., Dick, Don D., and Hunyadi Murph, Simona E. Hyper-Raman spectroscopy of CeO2. United States: N. p., 2020. Web. doi:10.1002/jrs.5886.
Villa‐Aleman, Eliel, Houk, Amanda L., Dick, Don D., & Hunyadi Murph, Simona E. Hyper-Raman spectroscopy of CeO2. United States. doi:https://doi.org/10.1002/jrs.5886
Villa‐Aleman, Eliel, Houk, Amanda L., Dick, Don D., and Hunyadi Murph, Simona E. Sun . "Hyper-Raman spectroscopy of CeO2". United States. doi:https://doi.org/10.1002/jrs.5886. https://www.osti.gov/servlets/purl/1632835.
@article{osti_1632835,
title = {Hyper-Raman spectroscopy of CeO2},
author = {Villa‐Aleman, Eliel and Houk, Amanda L. and Dick, Don D. and Hunyadi Murph, Simona E.},
abstractNote = {Cerium dioxide (CeO2) belongs to the fluorite structure group (Oh 5 point group) resulting in one Raman active T2g mode and two IR active T1u TO and LO modes. The T2g Raman band in CeO2 has been used to probe the symmetric Ce-O vibrational mode of different sized nanoparticulates. Far infrared studies of the Ce-O interactions are difficult to conduct due to low optical transmission, efficiency of the detector and water absorption bands interfering with the measurements. The selection rules of hyper-Raman spectroscopy (HRS) allow the study of IR bands in the far infrared spectral region, such as the motion of the Ce atoms. For the first time, HRS was used to investigate the T1u TO and LO IR modes in CeO2. The position and full-width half-maximum (FWHM) of the TO and LO bands in the HRS spectrum were used to investigate the spectral response in relation to particle size (i.e., phonon confinement). The investigation of CeO2 with HRS provides a research platform for future work in the study of ThO2, UO2 and PuO2 IR modes.},
doi = {10.1002/jrs.5886},
journal = {Journal of Raman Spectroscopy},
number = 7,
volume = 51,
place = {United States},
year = {2020},
month = {4}
}

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