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Defects in graphite crystals irradiated at high temperatures

โœ Scribed by P.A. Thrower

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
139 KB
Volume
10
Category
Article
ISSN
0008-6223

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โœฆ Synopsis

The changes in dimensions and lattice parameters produced by irradiation in two reactors with very different dose rate have been studied over the temperature range 400-700ยฐC. In this range it is found that the activation energy associated with the equivalent temperature concept is not constant. It increases with the amount of damage but is otherwise independent of temperature. The implications of this result of radiation damage and dimensional change theory are discussed. 125. Defects in graphite crystals irradiated at high temperatures P. A. Thrower (The Pennsylvania State University, University Park, Pennsylvania). Single crystals of graphite irradiated at 1250-1300ยฐC to a dose of 13.5-15.0 X 10%' n/cm" (E > 0.18 MeV) have been studied by electron microscopy. Defect structures have been found after annealing above 2000ยฐC which are different from anything previously reported. It is hoped to elucidate these phenomena and relate them to the known dimensional changes of the crystals.

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