Document Type

Article

Publication Date

2019

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.

Comments

This record sources the open access CHORUS-furnished accepted manuscript (post-print) version of the article. An embargo was observed for this posting in accordance with the publisher and the research funding body.

The publisher version of record is a subscription-access article, appearing as cited below in volume 114 of Applied Physics Letters, hosted at Scitation (AIP). Readers outside of AFIT will need to access the article through their own digital subscription to that periodical.

DOI

10.1063/1.5087059

Source Publication

Applied Physics Letters

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