Forming Features of Thermoelastic Peaks at Heavy Metal Bombardment by Ions of Low and Intermediate Energies

Alexandr Kalinichenko National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine https://orcid.org/0000-0002-5675-3947
Sergej Perepelkin National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine
Vladimir Strel’nitskij National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine https://orcid.org/0000-0001-6047-6981

Keywords: low–energy ion, amorphous and/or (nano)crystalline target, heavy metals, atomic cascade, melting

Abstract

Possibility of forming of the subsurface nonlocal thermoelastic peaks (SNTP) by ions of low and intermediate energies in heavy metals is investigated. By examples of ions Xe⁺(U⁺) implanted to amorphous or (nano)crystalline Au (U), the existence of such ion boundary energy ~ (15–50) keV is shown that the SNTP with energy forms according to the model of NTP of low-energy ion which was earlier proposed. By the judgement method of cascades appearing at computer simulation of ion bombardment process the values E_NTP are determined for examined combinations of “ion-metal”. It is shown that SNTP formation is possible at as a simply heating region appearing on basis of subsurface (sub)cascade. SNTP parameters are determined by (sub)cascade size, heat smearing and phonon loss in the (sub)cascade. Upper estimate of probability of spherical SNTP formation with material melting for combinations “U⁺ - U”, ”Xe⁺ - Au” and ion energy is given.

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References

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