Brief Communications

Field ion microscopy of cascades of atomic displacements in metals and alloys after various types of irradiation

V. A. Ivchenko<sup>ab

a</sup> Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg
^b Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Ekaterinburg

Abstract: Experimental results on atomic-spatial investigation of radiative defect formation in surface layers of materials, initiated by neutron bombardment (of Pt, $E>0.1$ MeV) and ion implantation (in Cu$_3$Au: $E = 40$ keV, $F = 10^{16}$ ion/m$^2$, $j = 10^{-3}$ A/cm$^2$), are considered. Quantitative estimates are obtained for the size, shape, and volume fraction of cascades of atomic displacements formed under various types of irradiation in the surface layers of the materials. It is shown that the average size of radiation clusters after irradiation of platinum to a fast neutron fluence of 6.7 $\times$ 10$^{22}$ m$^{-2}$ ($E>$ 0.1 MeV) is about 3.8 nm. The experimentally established average size of a radiation cluster (disordered zone) in the alloy after ion bombardment is 4 $\times$ 4 $\times$ 1.5 nm.

Received: 14.02.2014

 English version: Technical Physics, 2014, 59:9, 1403–1405

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