The optical properties of liquid cerium at 632.8 nm |
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| Affiliation: | 1. Nuclear Materials Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;2. Containerless Research, Inc., 906 University Place, Evanston, IL 60201, USA;1. Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luis, KM 235, CP 676, 13565-905, São Carlos, SP, Brazil;2. Occupational and Environmental Medicine, University and Regional Laboratories Region Scania, SUS, Lund, 221 85 Lund, Sweden;3. Division of Occupational and Environmental Medicine, Lund University, SUS, Lund, 221 85 Lund, Sweden;4. National Research Centre for the Working Environment, Lersø Parkallé 105, DK-2100 Copenhagen, Denmark;1. National Nuclear Laboratory, Central Laboratory, Sellafield, Seascale, Cumbria, CA20 1PG, United Kingdom;2. National Nuclear Laboratory, Workington Laboratory, Havelock Road, Derwent Howe, Workington, Cumbria, CA14 3YQ, United Kingdom;3. National Nuclear Laboratory, Preston Laboratory, Springfields, Salwick, Preston, Lancashire, PR4 0XJ, United Kingdom;4. Sellafield Ltd., Sellafield, Seascale, Cumbria, CA20 1PG, United Kingdom;5. Sellafield Ltd., Hinton House, Risley, Warrington, WA3 6GR, United Kingdom |
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| Abstract: | The normal, spectral emissivity, ελ(T), and optical constants, n and k, of liquid cerium were measured at 632.8 nm over a temperature range of 1700–2130 K using rotating analyzer ellipsometry. The cerium was electromagnetically levitated to prevent contamination of the liquid metal by contact with a container and purified by vaporization of volatile oxides at high temperature. The emissivity at 0.9 μm and 1900 K was determined from the brightness temperature. The solubility of oxygen in liquid cerium at 1786 K was estimated and the effect of oxygen on the optical properties was demonstrated. Using available thermodynamic data and assumptions of ideal solution behavior, the volatilization of oxygen and nitrogen impurities is discussed. At 1786 K, the solubility of oxygen in liquid cerium is between 3 and 7 atom percent. |
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