Nuclear Science and Engineering · 1965 · 31 citations · 0 references
Natural SciencesMaterials SciencePhysicsInorganic ChemistryOptical MaterialsSpectroscopyAbsorption SpectroscopyInfrared SpectroscopyInorganic SpectroscopyOptical Properties Of MaterialsOptical Properties Of SolidsOptical SpectroscopyAbsorption SpectraAbsorption SpectrumInfrared Absorption SpectraInfrared Absorption SpectroscopyInfrared SpectraOptical Absorption CoefficientOptical Absorption SpectraUranium Dioxide
The absorption spectra for single crystal and polyerystalline UO2 have been measured between 0.6 and 15 μm at room temperature. The spectrum for UO2 resembles that of a typical semiconductor, opaque in the visible but transparent over a large portion of the infrared. An absorption edge is located at approximately 0.6 μm (2.0 eV). A large optical window extends from 3 to 13 μm.The absorption coefficient for single crystal UO2 has been determined between 1.5 and 15 μm. A maximum value of 57 cm-1 was measured at 1.70 μm with minimum values of 6 cm-1 at 2.75 and 8 μm. The absorption coefficient of polyerystalline UO2 at wavelengths less than 8 μm is estimated to be ten times larger than for single crystal UO2.