Damage threshold and structure of swift heavy ion tracks in Al2O3

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00508700" target="_blank" >RIV/61389021:_____/17:00508700 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/17:00510740
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1361-6463/aa8ff5" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6463/aa8ff5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6463/aa8ff5" target="_blank" >10.1088/1361-6463/aa8ff5</a>

Result language
angličtina
Original language name
Damage threshold and structure of swift heavy ion tracks in Al2O3
Original language description
Structure changes and their formation threshold in swift heavy ion (SHI) tracks in Al2O3 are studied using a combined start-to-end numerical model. The hybrid approach consists of the Monte-Carlo code TREKIS, describing kinetics of the electronic subsystem, and classical Molecular Dynamics for lattice atoms. The developed approach is free from a posteriori fitting parameters. Simulations of Xe 167 MeV ion impacts show that relaxation of an excess lattice energy results in formation of a cylindrical discontinuous disordered region of about 2 nm in diameter. Recent transmission electron microscopy observations agree with these results. The threshold of an SHI track formation is estimated to be similar to 6.1 keV nm(-1). Calculated x-ray diffraction patterns of irradiated material demonstrate more pronounced damage of the Al atoms sublattice near SHI trajectories. Modeling of Xe ion tracks overlapping demonstrates that the damaged area can be restored to a near virgin state. Estimations give 6.5 nm as the minimal distance between the Xe ion trajectories resulting in recovery of the transformed structure produced by the previous ion.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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