Atomic-scale insights into damage produced by swift heavy ions in polyethylene

0579673 - FZÚ 2024 RIV DE eng J - Journal Article
Babaev, P. - Akhmetov, F. - Gorbunov, S. - Medvedev, Nikita - Rymzhanov, R. - Voronkov, R. - Volkov, A.E.
Atomic-scale insights into damage produced by swift heavy ions in polyethylene.
Journal of Materials Science. Roč. 58, č. 45 (2023), s. 17275-17291. ISSN 0022-2461. E-ISSN 1573-4803
R&D Projects: GA MŠMT LTT17015; GA MŠMT(CZ) LM2023068; GA MŠMT(CZ) EF18_053/0016627
Grant - others:OP VVV - Mobility FZU 2(XE) CZ.02.2.69/0.0/0.0/18_053/0016627
Institutional support: RVO:68378271
Keywords : swift heavy ion tracks in polyethylene (PE) * computation * theory * Monte Carlo code TREKIS * track parameters evaluated
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.5, year: 2022
Method of publishing: Limited access
https://doi.org/10.1007/s10853-023-09117-8

We describe the formation of swift heavy ion tracks in polyethylene (PE) by combining the Monte Carlo code TREKIS, which models electronic excitation in nanometric proximity of the ion trajectory, with the molecular dynamics simulating a response of the atomic system to the excitation. The model predicts circular tracks in amorphous PE but elliptical ones in crystalline PE caused by preferential propagation of excitation along polymer chains during the cooling stage. The obtained track sizes and shapes agree well with the high-resolution transmission microscopy of tracks in PE with colorant. The velocity efect in PE is shown: the track parameters difer for ions with the same linear energy losses but diferent velocities.
Permanent Link: https://hdl.handle.net/11104/0348489