Description: The use of color centers showed that the number of defects produced in NaCl by fast reactor neutrons is consistent with existing theories on radiation damage. Color centers were also used to siudy the growth and annealing of defects formed in Al/sub2/O/sub 3/ and fused silica by reactor irradiations. Overall, as the amealing temperature was raised for Al/sub 2/O/sub 3/, the number of reactor-induced defects decreased and at 700 and 730 un. Concent 85% C they disappeared entirely. Reactor-irradiated samples, which were fully annealed, did not color any more than virgin ones even with gamma ray doses of 10/sub 9/ r. Defects detected by color centers in fused silica were not removed until the samples were heated to 700 un. Concent 85% C or slightiy higher. The techniques used to determine defects are described. (P.C.H.)
Date: January 1, 1963
Creator: Levy, P.W.
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