Some studies of the effect of irradiation on the neutron small angle scattering from graphite

✍ Scribed by D.G. Martin; J. Caisley

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 486 KB
• Volume: 15
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(77)90010-0

✦ Synopsis

The small angle scattering from a number of graphites which had been neutron irradiated at 1050°C to doses up to 5 X 10" n.cm-* (Dido Nickel Equivalent) has been studied. Irradiation results in a decrease in the number of pores and regions of disorder whose radius of gyration is -100 A and an increase in the number whose corresponding dimensions are -25 A. Fractional changes in the volume of these samples due to irradiation were also studied and the well known shrinkage, followed by turn-around and e:pansion with increasing dose observed. However it was not possible to correlate changes in the 100 or 25 A porosity during irradiation with this accompanying turn-around. It is concluded therefore that such a correlation will occur with pores larger than -100 A. Evidence is oresented which sueeests that the defect structure of different types of graphite becomes -more nearly similar as a result of irradiation.