Damage along swift heavy ion trajectory

A swift heavy ion leaves a damaged trail (SHI track) while penetrating through a solid. The radius of the track depends on the ion energy loss and velocity, and thereby on its penetration depth. Applying developed Monte Carlo code TREKIS and molecular dynamics approach we describe the damage distrib...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2019-02, Vol.440, p.25-35
Main Authors: Rymzhanov, R.A., Gorbunov, S.A., Medvedev, N., Volkov, A.E.
Format: Article
Language:English
Subjects:
Electronic excitation
Molecular dynamics
Monte Carlo simulation
Olivine
Swift heavy ion irradiation
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Summary:A swift heavy ion leaves a damaged trail (SHI track) while penetrating through a solid. The radius of the track depends on the ion energy loss and velocity, and thereby on its penetration depth. Applying developed Monte Carlo code TREKIS and molecular dynamics approach we describe the damage distribution along the trajectory of an SHI (Xe and U) in olivine. This enables us to obtain the dependencies of the track radius and structure on the ion energy and its energy losses, as well as to identify the track formation thresholds in forsterite (Mg2SiO4) for fast and slow ions. It is found that the position of the maximal damage produced by an ion in a solid does not coincide with the Bragg peak of its electronic stopping. Loop-like dependence of the track radius on the electronic energy loss is identified.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2018.11.034