The scattering of long wavelength neutrons by defects in neutron-Irradiated graphite
作者： D. G. Martin , R. W. Henson
DOI: 10.1080/14786436408211878
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摘要: Abstract The additional elastic scattering of monochromatic neutrons, wavelength 7·5 A, produced by irradiating a sample AGXP graphite to dose 6 × 1019 fast neutrons/cm2 at 30°C has been measured as function the angle. If we make reasonable assumptions that equal concentrations vacancies and interstitials are present also scatter isotropically an estimate state agglomeration may be made, provided allowance is made for relaxation neighbouring atoms. result 4·2 per cluster; values interstitial vacancy each about 2%. radiation disappears almost completely after anneal 1100°C one hour, while intermediate temperatures shape curve identical obtained in irradiated condition. This suggests predominant annealing mechanism this temperature range not free migratio...
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