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Radiation-Induced Surface Migration Of Tungsten: Channeling Along Atomic Steps

Author

Listed:
  • E. V. SADANOV

    (National Science Center “Kharkiv Institute of Physics and Technology†, Akademichna Street, 61108 Kharkiv, Kharkivs’ka Oblast, Ukraine)

  • A. A. MAZILOV

    (National Science Center “Kharkiv Institute of Physics and Technology†, Akademichna Street, 61108 Kharkiv, Kharkivs’ka Oblast, Ukraine)

  • I. V. STARCHENKO

    (National Science Center “Kharkiv Institute of Physics and Technology†, Akademichna Street, 61108 Kharkiv, Kharkivs’ka Oblast, Ukraine)

  • J. A. GORDIENKO

    (National Science Center “Kharkiv Institute of Physics and Technology†, Akademichna Street, 61108 Kharkiv, Kharkivs’ka Oblast, Ukraine)

  • T. I. MAZILOVA

    (National Science Center “Kharkiv Institute of Physics and Technology†, Akademichna Street, 61108 Kharkiv, Kharkivs’ka Oblast, Ukraine)

  • I. M. MIKHAILOVSKIJ

    (National Science Center “Kharkiv Institute of Physics and Technology†, Akademichna Street, 61108 Kharkiv, Kharkivs’ka Oblast, Ukraine)

Abstract

The interaction of accelerated helium atoms with the atomic-smooth surface of tun+gsten single crystals was investigated using the low-temperature field-ion microscope, equipped with the source of helium atoms with an energy of 5 keV together with the techniques of molecular dynamics. It was observed the effect of the surface channeling of fast atoms of a target along the surface steps which occurs as a result of the collision cascade induced by the incident projectile. A substantial part of these displaced atoms in the target gains momentum oriented along the < 111 > close-packed crystallographic directions. The fine morphology of the trajectory of an excited tungsten atom reveals the transverse oscillations of the W atom normally to the < 111 > surface atomic step. The rate of the kinetic energy loss during the surface channeling of fast tungsten atoms does not exceed 0.4 eV/Ã…. This provides relatively large displaced surface atom ranges along the close-packed atomic steps. The found out results can be regarded as a special case of the correlation mechanism of the radiation-induced surface mass transfer.

Suggested Citation

  • E. V. Sadanov & A. A. Mazilov & I. V. Starchenko & J. A. Gordienko & T. I. Mazilova & I. M. Mikhailovskij, 2022. "Radiation-Induced Surface Migration Of Tungsten: Channeling Along Atomic Steps," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 29(05), pages 1-5, May.
    • Handle: RePEc:wsi:srlxxx:v:29:y:2022:i:05:n:s0218625x22500603
    DOI: 10.1142/S0218625X22500603
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