Overlap of swift heavy ion tracks in Al.sub.2./sub.O.sub.3./sub.

0578995 - FZÚ 2024 RIV NL eng J - Journal Article
Rymzhanov, R.A. - Medvedev, Nikita - Volkov, A.E. - O'Connell, J. H. - Skuratov, V.A.
Overlap of swift heavy ion tracks in Al₂O₃.
Nuclear Instruments & Methods in Physics Research Section B. Roč. 435, Nov. (2018), s. 121-125. ISSN 0168-583X. E-ISSN 1872-9584
R&D Projects: GA MŠMT LG15013
EU Projects: European Commission(XE) 654148 - LASERLAB-EUROPE
Institutional support: RVO:68378271
Keywords : swift heavy ion track * Monte Carlo simulations * molecular dynamics * aluminum oxide * transmission electron microscopy
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.210, year: 2018
Method of publishing: Limited access
https://doi.org/10.1016/j.nimb.2017.11.014

A structure in overlapping swift heavy ion track regions in Al2O3 is studied using numerical and experimental techniques. A swift heavy ion impact is modeled with Monte Carlo code TREKIS, describing excitation of the electronic and atomic systems, and with classical molecular dynamics tracing subsequent lattice relaxation. This combined approach is applied to simulate (predict) structure and phase transformations in tracks of heavy ions. The results of simulations are validated by high resolution transmission electron microscopy of irradiated crystals. The data obtained for 167 MeV Xe and 700 MeV Bi ion impacts in Al2O3 demonstrate that relaxation of the excess lattice energy results in formation of a cylinder-like discontinuous disordered region of about 1.8 nm and 3.4 nm in diameter, respectively.
Permanent Link: https://hdl.handle.net/11104/0347903