Abstract

Diffuse reflectance measurements were made on powdered uranium dioxide samples to which varying amounts of excess oxygen had been added. The principal purpose was to demonstrate that the optical constants and the description of the effects of excess oxygen on the absorption coefficient which were previously derived from studies of thin films of UO2 apply also to bulk material. The reflectance method is rather insensitive for highly absorbing material, but it is believed that the objective was achieved.

The characteristics of the reflectance method that tend to limit its easily useful application to material with small absorption coefficients are discussed briefly.

© 1960 Optical Society of America

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