RADIATION DAMAGE IN GRAPHITE. III. KINETIC REACTIONS OF INTERSTITIAL COMPLEXES: AN EXPERIMENTAL STUDY

Technical Report · Thu Oct 31 04:00:00 EST 1963

DOI:https://doi.org/10.2172/4686405· OSTI ID:4686405

Schweitzer, D. G.; Singer, R. M.

Dimensional changes resulting from reirradiations and anneals in repeatedly irradiated graphites show that the rate of formation of carbon atoms in interstitial complexes is proportional to the irradiation interval when reactions occur at both ends of the chain. When reaction occurs at only one end of the chain the overall rate of production of interstitial carbon atoms is initially dependent on the exposure and then becomes constant. The rate of decomposition of the complexes appears to depend only on the cross sections (number of carbon atoms) of the complexes. After removal of some of the complexes (by a thermal anneal), initial reirradiations decompose remaining complexes and form the complexes that were removed by the anneal. When the complexes that were removed by the anneal reach their steady state concentrations, further irradiation re-forms the complexes that decomposed. Prolonged reirradiations finally result in the successive formation of new complexes that anneal at high temperatures. (P.C.H.)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• DOE Contract Number: AT(30-2)-GEN-16
• NSA Number: NSA-17-024007
• OSTI ID: 4686405
• Report Number(s): BNL-6313
• Country of Publication: United States
• Language: English

Related Subjects

ANNEALING
COMPLEXES
DECOMPOSITION
DEFECTS
EXPANSION
GRAPHITE
HIGH TEMPERATURE
INTERSTITIALS
IRRADIATION
LATTICES
METALS, CERAMICS, AND OTHER MATERIALS
RADIATION EFFECTS
REACTION KINETICS