Abstract
The present work is devoted to determining the effect of reactor irradiation intensity on the expansion of the crystal lattice in diamond. The expansion of the diamond lattice under irradiation was measured by x-ray methods. For fast-neutron fluence 1019 cm−2 and temperature 270°C, the expansion of the diamond lattice can increase, decrease or remain unchanged as the intensity of irradiation changes. Quantitatively, the effect of the neutron flux density on the expansion of diamond is commensurate with the effect of fluence. For diamond, this effect of the intensity is explained by differences in the intensity of γ-radiation and the composition of the radiation, being only indirectly related to the neutron flux density. The effect of γ radiation becomes obvious when the expansion of the diamond lattice under irradiation in different irradiation facilities is different with the same neutron flux density and other conditions being equal.
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