Visible and Ultraviolet Absorption Properties of Uranium Dioxide Films*
Journal Article
·
· Journal of the Optical Society of America
Films of uranium dioxide ranging in thickness from 132 to 280 m mu were evaporated onto fused silica, annealed at a pressure of 10/sup -6/ mm Hg and 960 deg C, and measured for optical absorption between the wavelengths of 210 and 800 m mu . A moderately intense band observed at 240 io 500 m mu has an unsymmetrical shape with a maximum at about 318 m mu , an approximately linear part with a moderate negative slope between 318 and 380 m mu , and a large negative slope between 380 and 500 m mu . This broad band is undoubtedly at least two unresolved peaks. From 240 m mu to shorter wavelengths there is a very intense absorption band which is most probably the fundamental band for UO/ sub 2/. The extinction coefficient was found to vary from 0.0055 plus or minus 0.0007 at 650 m mu to a maximum of 0.3702 plus or minus 0.0010 at 360 m plus or minus and to a value of 0.167 plus or minus 0.004 at 240 m plus or minus . The index of refraction varied from 2.29 plus or minus 0.03 at 800 m plus or minus to a maximum of 2.58 plus or minus 0.22 at 450 m mu . The effect of oxidation of the films witinn the UO/sub 2/ phase suggests that the one unresolved band at 430 m mu is removed by oxygen and the one at 300 m mu becomes more intense. (auth)
- Research Organization:
- Argonne National Lab., Lemont, Ill.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-000746
- OSTI ID:
- 4220438
- Journal Information:
- Journal of the Optical Society of America, Journal Name: Journal of the Optical Society of America Journal Issue: 11 Vol. 49; ISSN 0030-3941
- Publisher:
- Optical Society of America (OSA)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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