AGGREGATION AND DISPERSAL OF RADIATION DAMAGE IN GRAPHITE
Crystals of natural graphite were irradiated in high-flux reactors to doses of about 4.8 x 10/sup 20/ n/cm/sup 2/ at temperatures in the range 150 to 650 deg C. The crystals were heat treated at 1500 deg C before irradiation. The damage effects at various temperatures are described. Annealing the low- temperature damage caused defects to form clusters, with the effect becoming more marked at about 1000 deg C. Damage incurred at 150 deg C began to disappear rapidly at annealing temperatures above 1500 deg C and at 1700 deg C there is little evidence of damage. Specimens annealed at higher temperatures were indistinguishable from unirradiated material. Results confirm the formation of highly stable complexes by the annealing of low-temperature damage. (C.H.)
- Research Organization:
- Atomic Energy Research Establishment, Harwell, Berks, Eng.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-014818
- OSTI ID:
- 4050568
- Journal Information:
- Nature, Journal Name: Nature Vol. Vol: 189
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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