The effect of dose rate on irradiation damage in graphite

✍ Scribed by J.W. Harrison; R.W. Henson; A.J. Perks; J.H.W. Simmons

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 139 KB
• Volume: 10
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(72)90456-3

✦ 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 400-700°C. 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 1250-1300°C 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 2000°C 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.