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Effects of Gamma Radiation on Cerium-Bearing Phosphate Glasses

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Abstract

A series of cerium-bearing phosphate glasses were investigated before and after exposure to gamma radiation in doses of 106, 107, and 108r. Measurements were made on the magneto-optic (Faraday effect) rotations exhibited by the glasses at liquid helium temperatures and in magnetic fields ranging to 70 kgauss. Absorption curves were also taken before and after exposure and also after annealing. No changes in Faraday rotation were observed, indicating that the cerium remained in the cerous state, but the height of a radiation-induced absorption peak, located at 3200–3400 A, was found to be inversely proportional to the amount of cerium present. A qualitative explanation of a possible mechanism is presented.

© 1961 Optical Society of America

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