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Title Band-to-band transitions and critical points in the near-infrared to vacuum ultraviolet dielectric functions of single crystal urania and thoria
Date 17.09.2019
Number 57154
Abstract Band-to-band transition energy parameters for single-crystal actinide samples of uranium oxide and thorium oxide were determined and compared using spectroscopic ellipsometry and critical-point dielectric function analyses. Spectroscopic ellipsometry measurements from the near-infrared to the vacuum ultraviolet spectral region were used to determine the dielectric functions of uranium oxide and thorium oxide. The critical-point structure is similar between UO2 and ThO2 but strongly blue shifted for ThO2. We find bandgap energies of 2.1·eV and 5.4·eV for UO2 and ThO2, respectively.
URL https://doi.org/10.1063/1.5087059
Publisher Applied Physics Letters
Identifier
Citation Applied Physics Letters 114 (2019) ID211901
DOI https://doi.org/10.1063/1.5087059
Authors Mock, A. ; Dugan, C. ; Knight, S. ; Korlacki, R. ; Mann, J.M. ; Kimani, M.M. ; Petrosky, J.C. ; Dowben, P.A. ; Schubert, M.
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