The morphology of radiation damage in copper irradiated with neutrons at elevated temperatures.
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Date
1977
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Abstract
This thesis is an investigation of the radiation damage
morphology of high purity copper crystals irradiated with fast
neutrons at temperatures in the range of 250C to 4OO C. At these
high temperatures neutron damage is found to accumulate into large
3-dimensional rafts up to 100 um in size, and the well known
homogeneous distribution of black dot damage which is characteristic
of irradiations at lower temperatures is not observed.
The characteristics and composition of the rafts of damage
0 at different temperatures in the range 250 C to 400 C have been
compared and found to differ to a large extent. It has also been
shown that the background areas between rafts contain a rather low
density of damage at all temperatures studied.
It is therefore concluded that many of the interstitial
atoms formed during irradiation migrate over large distances through
the crystal lattice to precipitate at the sites of the dislocations
forming the large rafts, and so denuded inter-raft areas are left
behind. It is proposed that these large rafts originate from grown in
dislocations present in the crystals before irradiation
Description
Thesis (Ph.D.)-University of Natal, 1977
Keywords
Radiation., Copper, Effect Of Radiation On., Theses--Physics.