On opportunity of droplet sputtering of heavy metals by heavy ions of low and intermediate energies

  • Alexandr Kalinichenko National Science Centre “Kharkov Institute of Physics and Technology” https://orcid.org/0000-0002-5675-3947
  • S. Perepelkin National Science Centre “Kharkov Institute of Physics and Technology”
  • Vladimir Strel’nitskij National Science Centre “Kharkov Institute of Physics and Technology” https://orcid.org/0000-0001-6047-6981
Keywords: heavy metals, ion bombardment, atomic cascade, thermoelastic peak, droplet sputtering

Abstract

A droplet sputtering of heavy metals by heavy ions in energy range of elastic loss domination is theoretically investigated. It is shown that the droplet sputtering is possible at ion energies  both below and above the maximum permissible energy of nonlocal thermoelastic peak (NTP<) formation ‑ a singly connected overheated region approximated by spherical segment. At E < ENTP melt emission from subsurface NTP< is possible in the range of ion energies E1< E <E2, and quantity E1 and E2 depend on sort of bombarding ions and structure of target material. At  >  the droplet sputtering provides nonlocal thermoelastic peak (NTP>), forming from subsurface subcascade and/or on cross of several subsurface subcascades. Localization, size and energy content NTP>, being random quantities, were determined by modeling with program package SRIM2008. Parameters and probability of NTP> forming, providing the droplet sputtering and cratering are determinated at ion energies E = 200 keV in cases of combinations “ion Au+ in Au” and “ion U+ in U”. Estimates of sputtering yields of droplet sputtering are determinated in the viewed cases.

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Published
2013-06-01
Cited
How to Cite
Kalinichenko, A., Perepelkin, S., & Strel’nitskij, V. (2013). On opportunity of droplet sputtering of heavy metals by heavy ions of low and intermediate energies. East European Journal of Physics, (1059(3), 57-64. Retrieved from https://periodicals.karazin.ua/eejp/article/view/12928
Issue
No. 1059(3) (2013): The Journal of Kharkiv National University, Physical series "Nucleus, Particles, Fields", ISSN 2221-7754
Section
Original Papers

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